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Have a 3126 cat in 2002 8500 gmc had shop change huie pump
have a 3126 cat in 2002 8500 gmc had shop change huie pump and ran it for 2 weeks and die agian this time it is dead 1000 km away from me and 2 hour hour away from cell service when left the truck i c… read more
Gary A.
Gary A.
Associates in Diesel Technology and Business Management
7 satisfied customers
I have 99 gmc c6500 topkick with 3126 cat only start with
i have 99 gmc c6500 topkick with 3126 cat only start with starter fuel … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Cranks then dies. Just installed a new recon pcm. Runs a few
Cranks then dies. Just installed a new recon pcm. Runs a few seconds and dies. … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
Would like to start diagnosing a problem with my 3126 using
Would like to start diagnosing a problem with my 3126 using cat man … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
3126 cat, engine started missing when started after sitting
3126 cat, engine started missing when started after sitting for a day. tried driving, no power, wouldn't hardly run below 1500 rpm. Stopped and hanged fuel filter. once primed seemed to run ok for a s… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
3126 cat starts and dies or won't used to die a few time and
3126 cat starts and dies or won't used to die a few time and then fine. Just got back three thousand mile trip. Now won't start at all if does die like shut key off. Showing coax 71 49 34 … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
2000 GMC Topkick with 3126 Cat will not start without ether.
2000 GMC Topkick with 3126 Cat will not start without ether. Seems ok once its running but if you slow down to stop it will die and will not restart without ether. Replace the fuel pressure regulator … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
Morning. Hoping Cat Man is around one? I am working on a
Morning. Hoping Cat Man is around for this one? I am working on a 1999 GMC cab forward truck with a 3126 Serial# ***** Short story is, Started the truck this morning, fired up as it should, ran fine. … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC
HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC 6500. ENGINE IS A 3126, ALLASON TRANS. ENGINE RAN GREAT A FEW DAYS AGO. NOW IT WONT START. STARTS WITH STARTING FLUID, BUT WONT CONTINUE TO RU… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
Im working on a 2001 cat 3126. Died while driving cranks but
Im working on a 2001 cat 3126. Died while driving cranks but no start. No communication on pro link. engine serial #ckm19576… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I am working on and 06 Pete 379 with a Cat C-15 MXS24605.
I am working on and 06 Pete 379 with a Cat C-15 MXS24605. The truck came in with a no start concern, died while driving down a rough road. Driver states it has new batteries and alternator in the last… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I have a GMC with a cat 3126 serial number 7as72171. It starts
I have a GMC with a cat 3126 serial number 7as72171. It starts fine and runs like a top. After about ten minutes on the road if you let off the gas and let the engine go below 1000 RMP the engine dies… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
2000 GMC C7500 3126 Cat. Shuts down occasionally and won't
2000 GMC C7500 3126 Cat. Shuts down occasionally and won't restart. Other days it starts and runs fine all day long. The only Data link we can find is OBD2. My Prolink IQ shows no communication. Is th… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a Cat Et up to it this evening with the right adapter I assume...7x-1714. The Cat et program says 1 ECM detected...initializing but not does an… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I HAVE A 2000 FREIGHTLINER WITH A 3126 CAT ENGINE-NO START
I HAVE A 2000 FREIGHTLINER WITH A 3126 CAT ENGINE-NO START CONDITION,CRANKS BUT WILL NOT STAY RUNNING,DIAG METHOD FOR HIGH PRESSURE OIL CIRCUIT.TRUCK CUT OFF WHILE DRIVING DOWN HIGHWAY.… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I am working on a CAT-NXS 20681 we did replace the ECM and
I am working on a CAT-NXS 20681 we did replace the ECM and we now have no engine codes. However it will still die occasionally. It will usually die when you go full throttle an then let it completely … read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
2000 GMC topkick with a 3126 cat engine. Shut off while running,
2000 GMC topkick with a 3126 cat engine. Shut off while running, will not restart. Checked voltage to ecm. 12 volts to pins 52 an 53 .I have 1200 psi. pressure in high pressure manifold while cranking… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 satisfied customers
I have an 2000 frghtliner FL70 w/3126 CAT. runs great ,but
I have an 2000 frghtliner FL70 w/3126 CAT. runs great ,but cant shut it off ,want restart. I have done service, filters , fluids , no diag codes present. can you help?… read more
Cat Man
Cat Man
Cat Engine Expert
10,344 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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