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99 FL 70 with 3126 CAT. Starts then dies… Following the
99 FL 70 with 3126 CAT. Starts then dies… Following the directions from above I get a blink, blink, pause, blink 8x … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2005 Cat C13 with Brand new oil cooler and brand
I have a 2005 Cat C13 with Brand new oil cooler and brand new single turbo conversion kit . Reprogrammed by a professional shop. Everything was working fine and running good until last week while driv… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
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I'm wanting to swap out my 8yl 3126 out of 2000 c7500 I want
I'm wanting to swap out my 8yl 3126 out of 2000 c7500 I want to put in ckm 2002 3126 for more power Don't know if I use old ecm or new on because for gauges ect … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
64 satisfied customers
I have a 95 freightliner with a 3126 cat motor it kept
I have a 95 freightliner with a 3126 cat motor it kept shutting off so we replaced the computer to it to caterpillar and they programmed it and it runs a min a still shuts off caterpillar sayd it isn'… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 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
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have an 02 fl80 with 3126 cat. It starts and runs 3 or 4
I have an 02 fl80 with 3126 cat . It starts and runs 3 or 4 seconds and then dies. Crank again for 4 to 10 seconds it will start and run fine. If I shut it off starts fine unless it sits 15 minutes th… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
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2000 GMC Topkick, 3126 Cat. Check gauges light will flicker,
2000 GMC Topkick, 3126 Cat. Check gauges light will flicker, buzzer will sound. Engine will die, just like the ignition switch was shut off. Starts back fine. Any ideas? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 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
Vocational, Technical or Trade Scho
10,344 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
6,062 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
6,062 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
10,344 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
6,062 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
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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
10,344 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
6,062 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
10,344 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
10,344 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
Expert
Expert
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,344 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

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Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

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All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

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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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