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I'm going to look at a 1998 T 6500 GMC tomorrow has a cat
I'm going to look at a 1998 T 6500 GMC tomorrow has a cat 3226 and a 6-speed manual Eaton. The truck has been parked since December and the owner went to start it today and is telling me that the truck is blowing the fuel pump fuse and had not done that before. The truck was supposed to be running very well. So I'm going to go try to troubleshoot it but I don't really know what to look for … read more
Curtis B.
Curtis B.
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Associate Degree
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I have a 2004 Freightliner Columbia CAT C15 engine, and the
I have a 2004 Freightliner Columbia CAT C15 engine, and the A/C compressor clutch never stops, it's always running even if I turn off the A/C from the interior and the truck has good air conditioning… read more
Mikael
Mikael
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1998 Freightliner FS 65 school bus. Had ignition switch out
1998 Freightliner FS 65 school bus. Had ignition switch out and body hit frame. Shorted out. No power to chassie. Power to terminal at fuse manel. Main 20 amp fuse good. Where is the 175amp fuse locat… read more
Scott Anthony
Scott Anthony
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I have 2000 FL 70 with a cat 3126 and Eaton autoshift tCNNhe
Hello I have 2000 FL 70 with a cat 3126 and Eaton autoshift tCNNhe truck only has 60,000 miles I bought the truck a year ago and have problems with the transmission. Had it towed into Freightliner and… read more
Mike Mcmillan
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CAT 3126 freightliner sport chassis. Just quit while
CAT 3126 freightliner sport chassis. Just quit while driving. Acts like its not getting fuel. We checked the fuel pump all was good. Mechanic said something made the ECM hot and shorted out and melted… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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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
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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
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I have a 2004 c4500 someone replaced the 7.8 with a cat 3126
I have a 2004 c4500 someone replaced the 7.8 with a cat 3126 and I was dumb enough to buy it,thinking it had originally came with the 3126..can the cat be wired to run and communicate with ecm and tra… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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Morning Cat Man. on a smaller 3126 Cat. I need to replace
Morning Cat Man. on a smaller 3126 Cat. I need to replace the front main seal. Is there a special installer required? I have the one for the C-15 but im assuming its to large. would you have a part # … read more
Cat Man
Cat Man
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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
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I have a 2004 F650 xl super duty with a CAT 3126. It will
I have a 2004 F650 xl super duty with a CAT 3126. It will crank but no start. The wait to start light will not illuminate on dash. Need fuse box schematics and any info on why this is happening.… read more
Cat Man
Cat Man
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2004 332CL, SERIAL BKJ-0444, ENG # ***** 3126 A ,5,500 HRS,
2004 332CL, SERIAL BKJ-0444, ENG # ***** 3126 A ,5,500 HRS, started dripping oil from the front of the motor. Took it apart and replaced lower seal, leak stopped. couple of days later started dripping… read more
Cat Man
Cat Man
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GMC 6500: I HAVE A 1998 GMC 6500 WITH A 3126 CAT ENGINE. NO
I HAVE A 1998 GMC 6500 WITH A 3126 CAT ENGINE. NO POWER TO STARTER FROM SWITCH,POWER COMING OUT OF NEUTRAL SAFETY SWITCH.… read more
Daniel Wilson
Daniel Wilson
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Hi Cat Man, I am a used Cat Engine dealer, I get about 100
Hi Cat Man, I am a used Cat Engine dealer, I get about 100 calls a week for used Cat and other Diesel engines. Problem I find is that some of the calls are for Machine Engines and I mostly stock Truck… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Morning Cat man. Hope you can help me with another one. 2004
Morning Cat man. Hope you can help me with another one. 2004 Cat ACCERT, #BXS09645. Barely runs. Reads cyl1 inj current high, cyl 2 inj current high, cyl 6 inj current high. Flash Code for cyl 1 is 72… read more
Cat Man
Cat Man
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CAT MAN PLEASE. 3126 TRUCK IN A 99 CHEVROLET MED DUTY TRUCK
CAT MAN PLEASE. 3126 TRUCK IN A 99 CHEVROLET MED DUTY TRUCK BATTERY IS NOT CHARGING, 11.8 VOLTS RUNNING 0 AMPS. HOW DO YOU FULL FIELD THE ALTERNATOR, WHAT POWERS OR GROUNDS ARE AT ALTERNATOR.… read more
Cat Man
Cat Man
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HI GUY,S my question is my 3126 cat motor is vibrating and
HI GUY,S my question is my 3126 cat motor is vibrating and a little slugish at take off.it surges while exelerating.any w3ay i did the fuel regulator and that helped a lot the cat man said there was a… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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hello. i am looking to buy a moving truck. 24/26 ft under
hello. i am looking to buy a moving truck. 24/26 ft under 26k gvw. around 150,000 miles. My options are: intl with 466 engine or FTL with a cat engine (both with 210-225 hp) any recommendations?… read more
Cat Man
Cat Man
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Meet the Experts:

Daniel Wilson

Daniel Wilson

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I am ASE Master Truck Certified.

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

Jeremy

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Curtis B.

Curtis B.

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

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Chris (aka-Moose)

Technician

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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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