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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
Vocational, Technical or Trade Scho
9,605 satisfied customers
My chevy c6500 has 3126 cat 7.2. It drives good for a few
My chevy c6500 has 3126 cat 7.2. It drives good for a few miles then the chevk engine light flashes on and it loses acceleration. i cannot get over 45 after that. we replaced the air, fuel filters as … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
I am swapping a c7 2005 with a 3126 1999-2000. I have all
second opinion] Hi I am swapping a c7 2005 with a 3126 1999-2000. I have all the harness, sensors and ECM on both engines. Both trucks runs. The C7 is on its way out. Will the cab, ignition switch and… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
Have a 6500 GMC cat 3217 dies intimately sometimes ruse for
Have a 6500 GMC cat 3217 dies intimately sometimes ruse for weeks before it dies. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I HAVE A CHEVY C6500 WITH A CAT ENGINE NO POWER TO STARTER
I HAVE A CHEVY C6500 WITH A CAT ENGINE NO POWER TO STARTER SILINODE TRYING JUMPING THE CLUTCH SILINODE AND WIRES GOT REALLY HOT.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I HAVE A 2000 GMC WITH A CAT 3126, SOME DAYS IT WILL START
I HAVE A 2000 GMC WITH A CAT 3126, SOME DAYS IT WILL START AND RUN FINE THEN I WILL BE DRIVING 65 MPH AND IT DIES AS IF I TURNED THE KEY OFF. SOME TIMES IT WILL RESTART BEFORE I STOP. IF I CRANK ON IT… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
I have a gmc 7500 with a cat that has a electrical problem
I have a gmc 7500 with a cat that has a electrical problem to the engine. Do you have a real good gmc mechanic available at this time. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I have a 1999 GMCc8500 with cat 3126 speedo and tach are not
I have a 1999 GMCc8500 with cat 3126 speedo and tach are not working. Looking for wiring diagrams and possible causes… read more
Jr Gilliam
Jr Gilliam
Diesel Technology
1 satisfied customers
2000 chevy c-7500 with cat 3126b. no power on ecm terminal
2000 chevy c-7500 with cat 3126b. no power on ecm terminal 70. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
I have a 1999 gmc 7500, 3126 cat engine, Vehicle has no
I have a 1999 gmc 7500, 3126 cat engine, Vehicle has no start signal at starter, good voltage to and out of ignition switch. Ignition switch and starter are new. I need a diagram of where this wiring … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,243 satisfied customers
98 fl70 with cat motor. Doesn't crank below 32 deg. Replaced
98 fl70 with cat motor. Doesn't crank below 32 deg. Replaced starter and solenoid with no change. Is there another electric relay or could it be the ign. Switch?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 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
Vocational, Technical or Trade Scho
9,605 satisfied customers
I have a 3126 cat that I can pump up fuel pressure with hand
I have a 3126 cat that I can pump up fuel pressure with hand primer pump but will lose pressure if it is running or not?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
I have a M2 freightliner with a 3126 cat engine. Engine
I have a M2 freightliner with a 3126 cat engine. Engine starts and runs fine. After it starts we have no reading on the Tach, Speedo, Water temp or Oil pressure gauges. All gauges cycle at start up an… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
WHAT IS THE CORRECT PART NUMBER FOR A CAT 3126 WATER PUMP BELT?
WHAT IS THE CORRECT PART NUMBER FOR A CAT 3126 WATER PUMP BELT? IT IS IN A 2000 CHEVY C6500 FLATBET… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
i have a 3126 cat in a magnum chassis for a Beaver Monterey
i have a 3126 cat in a magnum chassis for a Beaver Monterey Motorhome. After not running it for several months, i recently started it up only to have it run for a short period of time, 3-4 minutes and… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,605 satisfied customers
I have a 1999 GMC C6500 with a 3126 Cat that will not start.
I have a 1999 GMC C6500 with a 3126 Cat that will not start. Cranks fine, Check engine light comes on and shuts off, has 4000 PSI Hydo pressure and fuel pressure bounces between 20 and 25 PSI at the p… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
Need help troubleshooting Cat Marine diesel engines.
I know there have been some problems with Cat. Marine engines. I am trying to find out the good and bad of the 3116, 3126, and 3208.… read more
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Expert
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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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