Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 1998 freightliner fl70, came in with a actuation
I have a 1998 freightliner fl70, came in with a actuation pressure sensor issue we replaced the sensor with an OEM cat sensor we then ran the unit and still has the issue did a cylinder cut out and cy… read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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I have an 2000 Freightliner FL70 with a cat 3126. When I do
Good day, I have an 2000 Freightliner FL70 with a cat 3126. When I do an air brake test a buzzer (I was told low oil pressure) stays on when I shut the engine down and turn the key back to on. I am ta… read more
Wayne
Wayne
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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
Mike Mcmillan
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I have a 99 3126b that after reaching operating operating
I have a 99 3126b that after reaching operating operating temp, with good oil psi, after sitting 15 min. cranks hard to restart. I've replaced the low psi oil pump (Got great psi after that), fuel fil… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I have a 3126 in o2 FL70 dump truck 7 yarder. Lately I have
I have a 3126 in o2 FL70 dump truck 7 yarder. Lately I have to crank the engine longer for it to start like 15 to 25 seconds. Battery ate good and I plug it in on over night for it to trickle charge. … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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MY 1999 FL70 CAT 3126 IS LOSING POWER & SHUTTING ITSELF OFF
MY 1999 FL70 CAT 3126 IS LOSING POWER & SHUTTING ITSELF OFF BUT ONCE I RESTART IT AFTER PUMPING THE GAS PEDAL IT DRIVES FOR A LITTLE BIT & LOSES POWER & SHUTS OFF. KEPT REPEATING TILL I GOT OFF THE HI… read more
Cat Man
Cat Man
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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
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Vocational, Technical or Trade Scho
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I have a 2001 cat 3126 in a fl70 box truck with 276,000
i have a 2001 cat 3126 in a fl70 box truck with 276,000 miles the flash codes are 39 15 49 12 61 69. It starts up then the engine protect light comes on and shuts the motor down. I cleaned all connect… read more
Cat Man
Cat Man
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1997 Freightliner FL70 with 3126 Cat Engine and Automatic
1997 Freightliner FL70 with 3126 Cat Engine and Automatic Transmission.The Water\Oil light is coming on intermittently along with a buzzer. Can someone help me trouble shoot this? I don't want to arbi… read more
FIX-IT
FIX-IT
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2002 business class with cat. loses fuel to injectors when
2002 business class with cat. loses fuel to injectors when driving at low rpms. Mostly when deceleration going down hill. … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I am replacing the cam sensors on an 01 FL70 cat 3126, it looks
I am replacing the cam sensors on an 01 FL70 cat 3126, it looks really tight to remove the compressor, will I have enough room removing the heui pump?… read more
FIX-IT
FIX-IT
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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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Cat 3126 with 10 speed automatic. Good combo in a FL-70 with
Cat 3126 with 10 speed automatic. Good combo in a FL-70 with a 12' Toter home body? will be pulling a 36' fifth wheel trailer weighing about 15k behind it. Heading from east coast to yellowstone, down… read more
Cat Man
Cat Man
Cat Engine Expert
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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
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I have 2000 Ford Heavy Duty with 3126-B runs great when running
I have 2000 Ford Heavy Duty with 3126-B runs great when running but will stop running at any time.will not start unless starting fluid used,fires off and runs great until the next time in quits. We no… read more
Cat Man
Cat Man
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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
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I have a cat 3126 in a 2001 fl70 farm truck. came in with a
I have a cat 3126 in a 2001 fl70 farm truck. came in with a load last night, no power. Fuel filters have 200 miles, but that's what it acts like. Flash code 39 Harlan… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a FL70 3126 Cat. Problem started out to be a surge at
I have a FL70 3126 Cat. Problem started out to be a surge at road speed ( goes off power and comes on strong). WOT seems ok. Now it will surge and if I stop on an exit ramp, idle surge is bad and stal… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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Daniel Wilson

Daniel Wilson

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Chris (aka-Moose)

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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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