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Related Medium and Heavy Trucks Questions
My 3126 cat diesel engine idles high and a little shaky and
My 3126 cat diesel engine idles high and a little shaky and when i put it in gear and press on the gas pedal it sputters and it does it every time i accelerate.but it still does 70 on the highway.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
3126 cat will only start on ether. 8yl54721 in a 2000
heui pump replaced, cam sensors replaced, checked cam sensor gap, installed 2 different test ecm's, checked for injector oil leaks, have 1300 psi oil at block, good fuel pressure, good power and grounds at ecm, checked ecm harness and load tested wires, after starting with ether it runs smooth all day. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
Marine 3126B and when running at 2500+ For 5-10 minutes it
Marine 3126B and when running at 2500+ For 5-10 minutes it blows the gasket on the secondary fuel filter. No issues at a lower rpm. Could it be just a bad filter?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have a 1998 gmc top kick with a cat 3126 motor will not
I have a 1998 gmc top kick with a cat 3126 motor will not start unless I manually prime then runs and stalls after the primed fuel runs out sometimes stays running driving tell you take a corner or go… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
Cat 3126b losing prime. : I've used cat man before. my last
I've used cat man before. my last problem was diagnosed as a shorted IAP sensor and haven't had any problems for 18 mos. then it just crapped out in basically the same way it did before an I'm unable to start. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
Bart, have 60 series60 11.1 in bus. Will not start. Put new
Bart, have 60 series60 11.1 in bus. Will not start. Put new srs & trs sensor … read more
Curtis B.
Curtis B.
Technician
Associate Degree
991 satisfied customers
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The engine would not turn enough RPM to shift out of 4th gear. Fuel filter and water separator filter change . Small amount of black slime found… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have an Allson AT540 in my 76 international dump truck. I
I have an Allson AT540 in my 76 international dump truck. I was driving back home with it in 4th at 55 mph and it abrubtly downshifted into 3rd. I eventually messed with the lever enough and got it to… read more
Curtis B.
Curtis B.
Technician
Associate Degree
991 satisfied customers
3126 Cat the truck lost brakes at the off ramp had to use
3126 Cat the truck lost brakes at the off ramp had to use tran to stop the vehicle came to a stop and stalled and now wont start took High perssure fuel pump off to see if the pump is bad but it check… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
Catman, I asked you a question a few weeks ago regarding
Hey there catman, I asked you a question a few weeks ago regarding a “crank but no start” problem on a cat C15. It seems to be happening again. The truck in question is a 2007 peterbilt 379 (674827) c… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have 3126 cat that will not start I cranked over and made
I have 3126 cat that will not start I cranked over and made smoke the batteries were low so I charged them up and now it cranks fine and will not start could a sensor be stuck.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
Cat Man; I contacted you this morning about my 1999 Safari
Cat Man; I contacted you this morning about my 1999 Safari Zanzabar Motor Home with a 3126 Caterpiller Engine that would not start. We had problems & I lost contact… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have a 2000 Chevy C6500 with a Cat 3126. It will fire right
I have a 2000 Chevy C6500 with a Cat 3126. It will fire right up after I shut it off naturally, even after sitting overnight. However, when I drive it around after a few minutes it just shuts off afte… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
gmc c6500: My 2002 c6500 deisel towtruck started actin like
My 2002 c6500 deisel towtruck started actin like it wanted to cut off after it get up to about 4th gear then it would smooth out and go on.now it want start at all but acts like it want to start.i cha… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have a 2005 chevy kodiac 7500 dump truck with an auto. transmission.
I have a 2005 chevy kodiac 7500 dump truck with an auto. transmission. The engine is a Cat. C7 #3126. One of my workers ran the truck out of fuel and I can not get it started. I have fuel at the water… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
I have a 1997 mci 102dl3 bus and the bus will shift fine all
I have a 1997 mci 102dl3 bus and the bus will shift fine all the way to 6 and when I am stopping the trans will beep and show 4on the pad and the bus will not move also when I turn to the right or lef… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
I am working on a 3126 cat that will not start after the initial
I am working on a 3126 cat that will not start after the initial startup. Once it starts it runs fine but if you turn it off it will not start back up without ether. When I initially started working o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
7.2 cat in an 01 motorhome, drained the seperator (not much
7.2 cat in an 01 motorhome, drained the seperator (not much came out), now it doesnt want to start. any ideas/… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,638 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

2,803 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

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I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

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cumminsdr

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All types of Cummins applications

Curtis B.

Curtis B.

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dieseldan55

dieseldan55

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74 satisfied customers

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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