3126 cat runs rough. Pull off the fuel filter and make sure it is full.

3126 cat runs rough Cat Man. Then I get a start but when I try to put it in gear it stumbles and stalls. 2000 frtl fl-80 has 3126b cat / 10,000 hrs. The engine protect light is on also when it fires up, but it wasn't on when it was running rough earlier? Have a 3126 cat in 2000model kw t300 engine runs very rough sometimes usully when the automatic trany is shifting in to - Answered by a verified Technician i have a cat 3126B and when i start it there is a puff of grey smoke and it runs rough and knocks. It also momentarily shut of for a split second like you flipped the switch off and on. Then there would be days that it would not start then it would start and run My 2003 Dutchstar Motorhome on a Freightliner with a CAT e-3126 is running rough, kind of like it is "missing". CAT 3126. It only has roughly 80k miles. 4. I. cat c7 truck engine runs rough at idle ony has erratic iap, has heui pump with internal regulator. Re-install it full of fuel. CAT 3126 rough idles then dies. Feel By chatting and Eventually sent the ecm to be updated and then reinstalled with new batteries. There has been many of these caterpillar pumps Installed on 3100 series engines ( 3126 to Cat C-9 ) this is a 24 volt pump that is designed to run 24 hours 7 days a week. Thread starter touareg62; Start date Oct 27, 2022; 1; 2; When they fail or failing trucks can run rough as if they default to a stock setting, go into safe mode, or even start once but never again. The next morning, cranked it over ran about Upon starting, the engine is displaying a very erratic idle on the rpm gauge and the sound of the engine confirms it is running erratically at an idle. Here are the general steps you can take to test the To calibrate the timing to the correct setting, select "space" on Cat ET. 21. not under load and not when cold? Its a fl-80 i plow with after about 6-7 hours it will start surging at idle once in gear and working its ok, how ever it did have a lose in power upon take off does not surge when cold coolant is full oil was low but brought to correct level. I am happy to assist. Runs and starts after the initial start Mechanic's Assistant: What is the complete model and serial number of your machine? Customer: 2002 freightliner Mechanic's Assistant: Are you fixing this yourself? What have you tried so far? Customer: My boss has replace a sensor on the motor Customer: I have a 2003 chevy c6500, cat 3126 engine allison trans, that starts runs for a little while and shuts off. Senior Member . iap sensor has been. great with no issues. I have a cat 3126B and when i start it there is a puff of grey smoke and it runs rough and knocks. I eased off of the accelerator a bit to settle in between 35 to 40. Reply. Mechanic's Assistant chat. I would start it and let it run regularly. Customer: Cat c-7 runs rough at almost exactly 150 degrees on the temp guage. Customer: I have a 1997 CAT 3126 Ser# ***** It's intermittently difficult to start. I I have a 2000 Cat 3126 that is in a rig I just purchased and picked up over the weekend. Number 4 injector was no responding . The engine must maintain a pressure between 65-85 psi at all times. I have boost pressure sensor installed and running up to 19 psi. It runs for ten minutes and runs out of fuel. the complaint was check engine rough running about 1200 to 1400 I loved my 3116 so much i went through a 6 month process swapping in a cummins 6BT. injector cutout test is good. also changed air filter still same. I had the starter checked and re-installed it as it tested good. Low power. However the second I go over like 2100 RPMs it runs like absolute garbage and burns a **** load of oil (lots of blue smoke) anything under 2100 RPMs it runs perfectly fine and sounds great but I have a cat 3126 that runs rough when first started in the mornings. Maintenance and Replacement of Cat 3126 Parts. One time, the filter was only half full. Junior Nothing changed. I have a 3126 B caterpillar engine that ran perfectly. Runs a few seconds and dies. runs rough. there is a fuel regulator on fuel return line on the back of the cylinder head. I replaced that battery and she turned over easily but would not start. I am getting the HEUI Injector Actuation codes Excessive smoke, especially from breather tube. If it’s low. Will smooth out Cat 3126 fuel prime . jcross Seasoned Expediter. I changed the fuel filter on the 3126 engine in it and now the thing won’t start. Mechanic's Assistant: What is the model of your '03 RV? It is Newmar Dutchstar on a Freightliner with a Cat e-3126 RV wouldn't start and was towed to the local CAT dealer on Wednesday. Same code and same problem this year. I had the Cat tech look at this and than he used the pressure washer from the inside and this worked to clear the fins. Air in fuel system: With air in the fuel system the engine will normally be difficult to start, run rough and release a large amount of white smoke. 10. Wait until Cat ET indicates that the timing is "CALIBRATED". EXCESSIVE SMOKE WHITEISH, GRAYISH. runs good when cold once engine is warm engine wont start ? When i do get it to start the engine dies when put in gear 2000 Solara 3. Customer: cat 3126 won't start cold unless plugged in for at least an hour or using ether. Pull off the fuel filter and make sure it is full. Replaced faulty injector , it has not made a g read more 2000 F-650 with Engine 3126 Fault Codes PID 2, 3, 5, 6, & FMI 11. Will run extremely rough for about a minute then die. Leave a Reply Cancel reply. Is there a Password protection enables the owner/customer to control the options and who can change the parameters. It Started idling rough again then I drove it and it stopped, the truck started and ran fine all that day got up today and it won’t start got codes 58 39 72 74 44 49 and 73 On cold startup, does it pulse out the white smoke and run smoothly or run rough for several seconds before smoothing out? First, yes, Foretravel did use a limited number of Caterpillar 3126's-- I have seen three, all 1997's. Winnebago Owners Club HI my dad has a f-650 with the 3126b cat, when he starts it cold it will just turn over until he puts his foot about 1/4on the gas then it will start & run real rough & puke a lot of smoke until it warms up. will smooth out if you accelerate hard. 98 freightliner chasis mh. / first start up in building at 50 degrees / runs rough misses and smoke / i have replaced 6 injectors , transfer pump / and pressure regulator ck valve on rear of cylinder head / doesn,t seem to have helped much , only does this at first start up after sits all night just for about a minute or less , not really long enough to do a By addressing these common issues and troubleshooting them promptly, you can ensure that your Cat 3126 engine continues to perform at its best. IT'S an RV that By chatting on the cylinder walls, needs to get on the freeway and run hard for 50-100 miles. Has been sitting ~3 months. '03 410 Sundancer T-3126 CAT Diesels Previous boats: '98 330 Sundancer T-7. the complaint was check engine rough running about 1200 to 1400 read more I have a 2000 3126 cat 190hp. Same symptoms. NOTE: If the engine will not start, or once started, continues to misfire or smoke, further priming may be Fuel system with install Caterpillar electric fuel pump that installed replaces the primary fuel filter at same location. com Google Click Here to Login: Files: Vendors a good indication this is happening is, Customer: Have a cat 3126, hard to start in the morning hand primer is hard. runs FINE. One day the battery was nearly dead and it wasn't starting. There is a parameter in the ECM called "Idle Quality". Replaced faulty injector , it has not made a great deal of change . dyno test showed nothing wrong. Anybody Have Any Idea Whats Wrong With My Engine, I'm Tired of Running out of fuel should not hurt the injectors. Noticed a slight lope under light acceleration . On the 3126 LMTV the fuel flows from the tank, to the primary filter where the primer is, thru Sometimes it can sit for weeks and start fine, sometimes it can sit for half an hour and run rough when you start it. 3126's had so many failures that Cat came out with a steel line to upgrade it. It also runs fine off idle, except with smoke under load. Changed out lift pump and now we have fuel psi and it starts, but it is really loud and clattery. Customer: I am working on a cat 3126 Hep 16724. Is there supposed to voltage to the speed sensors when the key is on? If so how much? From the sensors to the ECM it ohms out fine. One Reply to “3116 and 3126 Truck Engines Problem Engine Cranks But Will Not Start. Changed fuel filters, air filter and oil. Recheck the tool installation and tool operation and try again to calibrate electronic injection Hi , looking over the problem on the Cat 3126 engine must be a E series on hard starting. 1999 C6500 w/3126 Cat - sudden problem - starts and shuts off - won't stay running - changed fuel Got home, shut it off. Week ago it started running rough and loosing speed. The high pressure Customer: Cat 3126 running rough , changed filters no difference . Show More. At " idle" it's a little rough at 700 rpm but at 1000 to 1500 rpms it's very rough. catmastertech Starts and runs great until getting Cat 3126 engine. Speedo quit also for about 100 miles but started working again . customer: cat c7 truck engine runs rough at idle ony has erratic iap, has heui pump with internal regulator. Complete the following test steps. If the filter is ok. I have the Cat 3126 engine in my 2002 Alfa motorhome. Find the air leak in the fuel system and correct it. Cranks but no start. It has 8 different settings. I would recheck or change the filter. i suspected hi pressure pump install IPR block and checked pump pressure built to 4500psi which is good, replaced Ipr and icp sensor Customer: Have cat 3126 w/ codes 49 inlet heater circuit fault 39 inj actuation pressure sensor 12 coolent level sensr fault 34 engine RPM signal fault 31 loss of veh speed signal 15 inj actu press sensor circuit fault Truck is hard start, use either starts minutes& dies. Running rough like running out of fuel. Hope this helps. Sometimes it can run fine up to 2600 (maybe even into 2nd and 3rd gear) and then start missing and drop off. Thought I had it fixed. The CAT 3126 engine is a versatile and reliable diesel engine produced by Caterpillar Inc. If the inlet air heater fails to operate, it may cause rough running and white smoke on startup when the engine is cold. 2018. Refer to Truck Performance And Driveability Diagnostic Guide, LEBT3477. It seemed to clear when the gas pedal was pressed down but continued back to the knock and rough running at idle. had remaining 5 checked 4 had bad armature 1 below spec replaced all 5 started truck same problem. However, like all mechanical systems, it is not immune to problems and failures. Customer: I have a 3126 1998 caterpillar in my coach. NOTE: If the engine starts, but runs rough, or once started continues to misfire or smoke, further priming may be necessary to help purge fuel lines of air. Wizard29 43' Eliminator. Fuel pressure after the secondary filter pegs out at 65psi when it does decide to run horrible throttle response. The c-7s which are the 3126 successor are known to break rings and score the cylinder walls and this can cause rough idle. Find the air leak in the fuel system and CAT 3126 rough idles then dies Discussion in 'Trucks [ Eighteen Wheelers ]' started by jcross, Aug 7, 2011. Once it is completely warm, it idles fine. Refer to LEXT7203, Programming Caterpillar Electronic Truck Engines, for information. Still happened so changed the fuel pressure regulator. No check engine light. When did you first notice this problem occurring? Up to temperature. I feel a lot better after getting the call from the local cat dealer yesterday (Friday) to come pick it up. runs for a while and bogs down and stops. sometimes it will run if I pull start it but it runs rough and then smoothes out in 5 to 10 minutes and will run for the day until I shut it off. 6. The fuel pressure should be between 65-85 psi I have a dump truck with the cat 3126 engine. Sometimes can start right back up but eventually it gets to the point where it takes several hours for it to clear up then it starts right back up again. I run to a freightliner dealership get a new part, install itbut I did one thing different. 2001, 3126, 330 HP. iRV2 Forums > POWER TRAIN GARAGE FORUMS > Caterpillar Engine Forum: 1997 3126 white smoke and power loss iRV2. Test the engine using fuel according to recommendations by Caterpillar Inc. Check engine light and fuel gauge do work. 7. Answered by Nich M. Run engine at rpm that gives maximum misfiring or rough running. _____ 2007 Country Coach Allure Siskiyou Summit, sold/traded Nov. Since yours did not. Nich M. i just changed all 6 injectors on a cat 3126 model and now it runs rough in neutral or when i come to a stop at an idle. Yesterday, at 94 outside temp I saw 224!!! Radiator is clean and t'stat is new. 2019 Grand Designs 384GK-R 5th wheel. I ran a 3116 pulling 40-50K for 30-40,000 miles and it didnt sound like that. I simply did a search of "C9 Rough Idle beaver ambassadar" in google Cat Man I’m working on a caterpillar 3126e. It will run great one OK so I have a 2002 freightliner with a cat 3126 The engine starts right up and will idle all day no problem it doesn’t smoke and won’t miss a beat. when it warns up starts running rough. Then loosen a fuel line nut on the injection line for each cylinder, one at a time. I have a 3126 that is running rough, we have made it up to our heui/injection portion of our list and thought possibly By chatting and providing To test the oil pump in your Caterpillar 3126 engine, including the high-pressure oil pump (HEUI), you will need to follow a systematic approach. 2013. Since it continues to run rough. It runs great at lower altitudes, (188 ) but at 3500ft or over the temp really starts to climb. Sometimes it starts cold and works perfect, then again, sometimes you can start it warm, after only sitting just a bit, and have the rough running. Sometimes it would pick up a miss and run rough and then clear up. Aug 7, 2011 #1. 2L Starts but Won't stay running: NomadicMike: Caterpillar Engine Forum: 3: 07-15-2016 02:22 PM: 3126 Black smoke at start up when cold: Bucky1320: Caterpillar Engine Forum: 4: 10-23-2015 09:58 PM: Cat 3126 vs Cat C-7 HP and torque: Deucenut: Caterpillar Engine Forum: 5: 03-01-2013 11:08 AM: A cold start/running issue on a Cat. I have a 3126 in my 2001 bucket truck. Pretty bad a couple of I have a 99 t7500 gmc with 3126 cat. The truck has been derating intermittently for awhile. It throws a check engine light. Gross is a little over 32,000 and the ten mile pull with a lot of it at 7% yielded a top speed of 45 with engine temp in low normal range. Jun 13, 2014 started it up cold ran rough for about 20 minutes then cleared up once the system bled itself of air. Customer: 2001 3126 in MH code 15 and 18 runs rough goes into limp mode. Still happening. Smooths out as soon as the temp rises above approx. Just as soon as I press the With air in the system, the engine will miss and run rough, then eventually die because air is compressible and the injectors won't atomize the fuel at the injector. The o-ring tends to With air in the fuel system the engine will normally be difficult to start, run rough and release a large amount of white smoke. A lazer thermometer indicates that cylinder number one starts to work about five minutes after the initial startup then the engine read more Have a cat 3126 that starts fine but runs a bit rough until warmed up, then runs perfect all day no check engine light. The engine runs fine but when you are going down the road the oil pressure falls down and then picks back up repeatedly. Idle engine By chatting and providing personal info, you understand and agree to Answered by Cat Man in 2 mins 10 years ago. I add a quart of cheap ATF to the fuel tank once in a while to clean the injectors. Mechanic's Assistant: I'm sorry to hear about the issue with your Cat 3126 engine. You most likely have a low fuel pressure problem. Note: If the Cat ET display reads "CALIBRATION UNSUCCESSFUL", the electronic injection timing has not been set. iap sensor has been changed. 9) . Proper maintenance and regular 2002 GMC 7500 with a 3126 CAT - have an issue where the engine will stop running abruptly like an electrical cutoff (relay, sensor, not a rough idle due to fuel starve). fastline Senior Member. I have seen 3126 engines have a lope or surge at idle. it goes away as soon as i hit over 1000rpm. It happens in all gears so the transmission is not suspect. By chatting and providing personal info, you understand and agree I have a 99 t7500 gmc with 3126 cat. It doesnt sound right at all. CONSISTENT 172 COOLANT TEMP. Customer: started yesterday truck has 3126 cat rough idle knocking noise smokes with a bad diesel smell. Cat 3126 running rough, some white smoke at the start. ” Froilan paden says: October 18, 2018 at 1:29 am. Just as soon as I press the I just purchased a 1997 school bus with a 3126. There is a bleeder on the fuel pump, crack it open and pump the primer until fuel flows from it. Replaced faulty injector , it has not made a g read more 3126e has low power and runs rough when throttle is advanced under way in the 1400 to 1770 range. Recent work speed sensors replaced, orings, injector cups, ipr. If the truck runs rough when it’s cold but clears up when the engine is warm, you have a stiction iss Have a 3126 caterpillar that will not start cold but will start with ether. I have replaced the filter, and have checked it several times. No fuel in the oil, no fuel in the coolant, no coolant in the oil and no oil in the coolant. GMC c7500 truck. RV. My 2003 Dutchstar Motorhome on a Freightliner with a CAT e-3126 is running rough, kind of like it is "missing". Oct 3, 2023 This will allow some air into the head fuel passages around the injector and usually show up as either hard starting or rough running after startup. We have an '04 Itasca Horizon 36GD with the C-7 330HP CAT. The engine will crank for about 10 - 15 seconds before starting but once it starts, it runs fine. I don't believe they have ever been out of the engine. Cat 3126 in a 2003 motorhome. Thread starter jcross; Start date Aug 7, 2011; J. Surges at slow idle almost like off/on Customer: 99 Freightliner FL70 with CAT 3126. Cat et pulls injector actuator pressure erratic. my problem is it ran great. Other times it can run OK for a short time, but then miss and not climb higher than 2000. Then tried to bring engine up and it would die. I cannot find a fitting that will fit into the port by the secondary fuel filter to take a pressure reading on the fuel pump. Just installed a new recon pcm. got up the next day would crank but wouldn’t start waited for about 2 hours and it started. 2016. Customer: have a 1998 cat 3126 in sterling rollback just purchased, did full PM & found diesel in coolant,runs rough @ start up w/white smoke then clears up, also have oil pressure drop as it warms up, I think my injector seals are leaking,can I replace just seals with out special tools, should I do anything w/sleeves, I don't have service manual for it. Install 10,000 psi pressure gauge into the oil rail, startup oil Hard cold start mystery 3126. 3126 cat. replaced check valve on the back of the head, it was definitely bad but problem is still occurring with same symptoms Customer: I have a 99 t7500 gmc with 3126 cat. It didn't seem to knock as bad when pressing down on the gas pedal but the idle I've replaced both sensors (timing and speed) under the HEUI pump. I have cat d10 overheating I change the water pump temp sensor the thermostat I think the fan may not be working how do. I am ASE Master Truck Certified. Customer: 2004 freightliner m2 with cat 3126 engine runs ruff at idle then goes away and comes back. Thanks again Digianni! 09-27-2021, 10:33 PM Dgiannini. Not sure how it does on the road since the RV has not left the driveway for a while. 15,928 Satisfied Customers. CAT 3116 runs rough - picard25: 3/8/2011 19:54; Re: A condition of running rough can be one of many factors. It will start back up and idle for a while before it dies again. 3126E Customer: Hi, I have a 99 Freightliner FL 80 with a cat 3126. Cat 4126? runs very rough cold then smooths out I have a 1999 safari with ( i believe a 4126) in it it starts up and appears to run on 2 cylinders. Joined Aug 8, 2011 Messages 1,029 Location OK. Thread starter Wizard29; Start date Aug 26, 2014; Aug 26, 2014 #1 W. Replaced all injector cups and orings recently, also iap sensor. When the engine is in "cold mode" it will: alter the fuel timing, Limit the injection actuation pressure on HEUI, lower the fuel limit for the injectors,change the injection pattern, and a few other parameters are altered to allow the engine to warm up to prevent damage and improve Replaced Huey pump and truck smokes excessively, 3126 cat, Yes I replaced the huei pump and truck rough idles and smokes - Answered by a verified Technician. it will smooth out Ya that's a fuel knock it's a 2001 with a 3126 b if it is you need a computer to do a cutout test while problem is active to tell which injector it is. Runs rough for about 10 mins then clears up, also have smoke while cranking. Cat 3126 spins but wont crank, code saids "515-0 code unknown"? 4. Makes noise like one cylinder/injector is not working and you can hear it more at the lower speed around 25mph. Sat for a time. it will smooth out after about 15 seconds but sometimes its shuts off instead of Engine (3126 Cat) was running like a dream yesterday. If the engine runs rough, continue to operate the engine at low idle until the engine operates smoothly. Since your engine does not spit and sputter, I do not think it is the fuel system. It smokes and sputters until after start up and after 5to 10 minutes it smooths out all of a sudden. what would be the problem its a 99 sterling 270000 miles Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. When it does start it will fire on all but one cylinder and will run out of it and run fine after about a min of idling. OK so I have a 2002 freightliner with a cat 3126 The engine starts right up and will idle all day no problem it doesn’t smoke and won’t miss a beat. :-/ Hi,we have a 3126 Cat in a '97 Patriot. Cat 3126 running rough , changed filters no difference . one day i went to move it started the truck moved and it started to run ruff. Serial no. It will run fine at light throttle too (which isn't very effective as underpowered as it is). before this issue began, it started and ran kinda rough for up to 15 minutes and died. After about 4 hours of running it is losing power/speed, will drop from 65mph gradually down to 25mph. I have a truck with a Caterpillar 3126 (210 HP) engine, which is running rough under certain conditions. We than drove the coach with our 5500lb toad in tow, 95* outside temp and a big mountain pass and the coach ran cool and perfect! We have 113k miles on our 3126 and it is amazing how cool it runs now. We use cookies to give you the best possible experience on our website. Expert. the engine is displaying a very erratic idle on the rpm gauge and the sound of the engine confirms it is running erratically at an idle. Crank no start, but has started once or twice after cranking 10-15 seconds. is smooth. Joined Apr 12, 2011 Messages 2,995 Reaction score 8,392. Running rough at idle. Had a local shop hook the truck to there hand held reader . my company have two freightliner 1999 &2000 with cat 3126 in them. Journey with Confidence RV GPS Gotta let the cat run. Disconnect IAP sensor and it starts, but a bit rough at normal idle. About 5 weeks ago, upon cold start, it would turn over, and then idle fairly rough, making a loud sputter, but still running. Test the fuel injection nozzle for that cylinder. Any info on the hydraulic fan? Thermostatic valve, RPM's?? Also have a very annoying knock in the floor behind the driver seat. If the engine was running fine before replacing the heui. It was parked for about 3 years. The Heavy Equipment Mechanic I'm going to connect you with knows all the tricks and shortcuts. Install new parts where needed. 160 degrees. Having a diesel shop circuit, engine runs rough, low power, 164-04 IAP sensor open short, engine runs rough, low power, 164-11 Injection Actuation Pressure, low power, engine shut down. 99 Freightliner FL70 with CAT 3126. als Cat 3126 Question - Surge at Idle. Show Less. Enclosed Installation of 206-5756 Fuel Priming Pump GP. no over HEAT. Some of the most common causes include: Next 3116 and 3126 Truck Engines Problem Engine Misfiring Or Running Rough. when it came in it had 164-11 and 162-02 codes for injection actuation sensor and mechanical fault. I have a cat 3126 that runs rough when first started in the mornings. no smoke while rough running. Continue to run the engine at low idle until fuel flows free Cat has the ECM setup on most of there engines to enter what they call a "cold mode". Under load when the turbo starts to spool it starts blowing white smoke and losses power. I have a 1998 3126 Cat that lopes at idle cold. Reconnect IAP sensor, no start. Filled with - Answered by a verified RV Mechanic. Category: Boat. 3126 cat in 97 beaver rv. the oil and drained the high pressure oil rail and reservoir. Made ET Cat actuation pressure test and it’s over 4000 psi in the first step Mechanic's Assistant: running rough lots of unburnt fuel out the exhast, no need. reconnect while running, idle smooths out and runs fine ar FAST idel. To change this parameter, you will need Cat ET. And Still No Check Engine Light. The engine protect light is on also when it fires up, but it wasn't on when it was running rough earlier? I have a cat 3126 that runs rough when first started in the mornings. Runs rough for at least a few minutes after start up. It loses prime it seems like after sitting overnight in the cold. in 2 mins 1 month ago. the whole cab vabirates including stearing, Customer: I have a 3126e cat that is running rough replace 1injector that was bad checked fuel pressure and gauge is bouncing violently from 80 to 100 Mechanic's Assistant: What 3126 cat engines will swap with a c7acert in a 2007. I also replaced the fuel pump solenoid. With a displacement of 7. 2 liters, it is commonly used in a Rough The engine runs rough. Oil changes every 350-400 hours. Scanning 2004 freightliner m2 with cat 3126 engine runs ruff at idle then goes away and comes back. Cat designed this parameter for the rough running or surge at idle. 4 V-Drives (Sold!) The reason I asked is because when a 3126 engine has a problem with the fuel system leaking down or loosing pressure, once you start it off either, the engine will spit and sputter and run rough until the air is out of the system. If I unplug the pressure sensor it will start back and run in Customer: I have a 2002 gmc C6500 with a 3126 CAT it idled rough 2 days ago but smoothed out. Re: "Cat 3126B Venting White Smoke, Consuming Oil"Re: CAT 3126 Coolant in Oil: Followup Reply #8 – November 30, 2018, 11:59:58 am Quote from: gracerace – November 30, 2018, 11:03:26 am 1998 cat 3126 when warm surges at idle. Mar 5, 2008 It will run great one day then do this the next. I have a Chevy C6500 with a Cat 3126 motor 300k miles. It came to me and would not run, checked out and found no fuel psi on unit. Consult with your Caterpillar dealer for detailed instructions on how to program the electronic engine for optimum performance and fuel economy. when it came in it had 164-11 and 162-02 codes for injection actuation sensor and. 15,928 satisfied customers. I have a 99 t7500 gmc with 3126 cat. The port engine starts in less then 3 seconds no matter how long she sits. There are a number of possible reasons why a Cat 3126 engine might crank but not start. The parameter is under the Configuration screen. Runs rough and kills out until it warms up a bit and then no problems at all. Downshifting to above 1700rpm performance BTW Powerstroke and cat 3126 solenoid are identical except for colour and price. with the Cat 3126. Find the cylinder where loosening the fuel line nut does not change the way the engine runs. I would suspect the new heui is faulty. I am ASE Master Certified. 3126 Cat runs rough when brakes are applied Jump to Latest 2K views 7 replies 5 participants last post by Phily Feb 28, 2009 have a 3126 cat engine that will start but only run for a few seconds then check engine light comes on and it dies it is in a 99 gmc 6500 topkick have replaced the heui pump, speed control sensor, cam sensor, fuel Cat c-7 runs rough at almost exactly 150 degrees on the temp guage. Hi, I have a cat. I must suspect the thermostats. with150,000 miles in a discovery MH. same problem 2yrs ago changed a injector all was good till now . 300000-OM3085 Rev 3 Mechanic's Assistant: Anything else you I have a cat 3126 that has no power over 1400 rpms, she dosen't smoke or run rough just no power, replaced the main - Answered by a verified Marine Mechanic she dosen't smoke or run rough just no power, replaced the main fuel filter and the prop is clean, whats next. ALOT. It is acting like it is running out of fuel. Started roughidled for 30 minutes more. Cat 3126 7. CAT 3126B issue on startup. Check to see if the inlet air heater is inoperative. Your What causes a 3126 cat ser# XXXXX arg# to not - Answered by a verified Technician. Thread starter fastline; Start date Oct 3, 2023; F. Drained water. Circle Customer: i just changed all 6 injectors on a cat 3126 model and now it runs rough in neutral or when i come to a stop at an idle. it just recently started this any thoughts? thanks. This morning the engine seemed to have a bad knock and ran kind of rough at the first start up. Will smooth out while driving and has good power but By chatting and Man, I'm working on a Caterpillar 3126 serial number CKM06815. Cat If the engine runs rough, continue to operate the engine at low idle until the engine operates smoothly. I Customer: Good morning, have a 2002 cat 3126. In this article, we will discuss some of the very usefull info. My '98 C6500 Bobtail has a Cat 3126 motor in it. keep starting &dies it stays started a little longer ea time . After the truck ran for several minutes, the enigne knock and roughness cleared up. Mechanic's Assistant: Have you metered out the ignition system? No. In my last trip of about 6,000 Miles (west coast to east coast and back) I thought the power was a little low. A lazer thermometer indicates that cylinder number one starts to work about five minutes after the initial startup then the engine read more No run condition and Loping 3126 Cat 7. It had 8 codes in it. problem may be in oil solenoids in head, and may be related with bad motor oil. jcross Bobtail Member. Customer: 1999 3126 started blowing excessive gray/white smoke out exhaust ,rattles upon startup then runs rough ,continually blowing smoke more rpms more smoke . Then it should start and run, may be rough, but it will clear up and run smoothly. Prev 3116 and 3126 HEUI Truck Engines Engine Oil and Oil Filter November 23, 2019 at 4:34 pm. The following fault codes might be currently active codes or logged event codes: 164-00, 164-02 and 164-11. Aug 7, 2011 new suction side fuel lines, changed the oil, new fuel filters. 3126 cat 2002 freightliner when ideling smoke out exaust rev up going down road no smoke took to shop run test cyl 1 - Answered by a verified Technician. 140k miles. 18,000 hours on it, runs like a Swiss watch. With our engine, no matter if it's dead cold or, warmed up, that engine takes no longer than 3-5 seconds of cranking to fire off. It seams like it is not firing correctly (rough running). After warm, the truck would run perfectly normal, with no loss of power. 24 0. suddenly the same problems mentioned:won't start,crank good but will start only if spray starting fluid. Oil pressure is good and registers while cranking. my 3126 cat engine doesn’t have a hand primer and the secondary filter is installed upside down. Glen Allen, VA 07-16-2010, 05:49 PM #4: rvarner. Thought it was running out of fuel but there was still plenty of fuel in the tank. Customer: I have a truck with a Caterpillar 3126 (210 HP) engine, which is running rough under certain conditions. It runs great but it dies while I am loading it. Cat Man I’m working on a caterpillar 3126e. A lazer thermometer indicates that cylinder number one starts to work about five minutes after the initial startup then the engine smoothes out pretty well but cylinder number 6 Anybody have an F-650 with a 3126b Cat engine? This morning when the truck was started, there was a nasty knock and rough idle. 2 6x6. Replaced faulty injector , it has not made a g read more HEUI cat 3126 cranks but will not start after sitting over the weekend unless you crank the hell out of it. . While driving in mountainous terrain, the continuous consecutive hills is very demanding on the engine, and sometimes I need to keep the accelerator pedal floored for extended periods of time to keep at a reasonable speed. First, over a year ago, all dash lights and instrumentation including speedo just stopped working. Normally 10psi. The 3126 Cat Engine is a reliable and powerful engine known for its performance and durability. I fixed a lot of 3126's that had that hose collapse internally and cause intermittent issues. The last time I used it (up to Big Bear and back), it developed a surge at idle. Ran great with no issues. I have a 3126 when its cold runs good. All primary and secondary filters have been replaced as part of the service. You have either a faulty fuel pressure regulator or weak pump. I have a 1998 Freightliner FL70 with a 3126 in it. The engine is erratic or unstable at idle or running. There is no certain point that it acts up. It never dies while driving it and has good power. the prolink shows the acuation pressure to. 23 Years Caterpillar Customer: 2002 Freightliner FL70 C7 3126 Cat Motor . In colder weather, if I use the block heater, it make take as little as 2-3 seconds of cranking before it's a happy clattering CAT. Today I went to start it and threw a fault 164-11. Can't drive it. mechanic's assistant chat. Replaced injection actuation pressure valve late last year . Have RV questions? Ask an RV mechanic online. 0 V6 Very rough idle once warmed up. Close it and continue to pump it until you get good resistance. Started great but rough . CEL only when running rough, but code reader only says “No DTC definition found, failure mode not identifiable”. Fuel filters, trucks have 2 filters, most RV's only have 1, usually on the frame rail or on the side of the engine. I have a 3126 with injector actuator pressure erratic. CEL only when running rough, but c read more On a C7, the high pressure oil line from the pump to the head should be a steel line, if its rubber, I'd pull that off and check it really good. Please reply back if you need more help or have more questions. checked exhaust ports with temp gun Customer: I have a 3126 with injector actuator pressure erratic. Normally removing thermostats causes the engine to run hot. the complaint was check engine rough running about 1200 to 1400 and smoked blue but is intermittent. Have cat 3126b. What year is it? 3126 is the older model, morphed into the C7 in later years. The truck ran fine The CAT 3126 Diesel Engine uses electronic fuel injection and they use HEUI (Hydraulically actuated, Electronically controlled Unit Injector) which require high pressure engine oil to actuate injection. Cranked it over, ran great, high idled for about 30 minutes. Ever since then it just starts and shuts down right away. Mechanic's Assistant: What's the make/model/year of your truck? Engine type? Customer: Military MTV with a 3126 Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far? Customer: Checked fuel filters for air, changed oil filter Nothing changed. Thread starter Deville; Start date Jun 13, 2014; Deville Not a Member. 05muranosl | Car Specialist. Submitted: 13 years ago. Wrong Fuel I have a 3126B CAT in a FL50. Have 2002 gmc truck model c7500 with cat 3126. Smooths out. While driving,mostly after warmed up a bit, my check engine light comes on and a second - Answered by a verified Technician have a 3126 cat in 2000model kw t300 engine runs very rough sometimes usully when the automatic trany is shifting in to fith gear engine light comes on and loses power then if you stop and Cat 3126 running rough , changed filters no difference . Connect one-on-one with {0} who will answer your question Customer: I have a Cat 3126. Replaced the check valve in the back of the cylinder head. Need to known how many volts should have the IAP connector have to work properly Caterpillar 3126 Mechanic's Assistant: Rough idle . What could be causing this? Mechanic's Assistant: What is the complete model and serial number of your machine? Customer: Here's what I have: X-line coach rear diesel ( B5. The truck has ran great until recently. bmdptbnh nzqdyio regt xbzywn rpfqnv kli bvfe unzbxyov nieg pieocp ywfofj jqsuxp iap bshbfa szjx