Medium and Heavy Trucks

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Im working on a c-15 acert customer complaint is misfireing
Im working on a c-15 acert customer complaint is misfireing below engine running temp. The misfire happens on loaded trailer or up a hill. No engine codes cant see fuel pressure. Im thinking injector … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
I have a 98 freightliner with c12. No power and code sid-84
I have a 98 freightliner with c12. No power and code sid-84 timing actuator #2. Changing fuel filters now. Any ideas what else to look for? … read more
Gary A.
Gary A.
Associates in Diesel Technology and Business Management
8 satisfied customers
2007 Pete. Mxs acert cat. Fuel restrictions light is on
2007 Pete. Mxs acert cat. Fuel restrictions light is on majorly of the time. All of my other trucks are same setup. They rarely go above 5. At idle im at 5. Highway speed im 7-10 on vac with light on.… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
I have a 99 fld 120 with a cat c12. the turbo oil supply
i have a 99 fld 120 with a cat c12. the turbo oil supply line is spraying oil at the fitting on the block. the fitting on the block looks fine. is there anyway to seal the pipe while waiting for a new… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Replaced injector o rings and still useing lot of oil. No
replaced injector o rings and still useing lot of oil … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Cat 3126, Ser. # 7AS77349, in a 1999 GMC C6500, Truck came
Cat 3126, Ser. # 7AS77349, in a 1999 GMC C6500, Truck came in with the fitting blown out of the back of the high pressure pump. Someone had just replaced the O ring. The threads were torn out. We repl… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
1999 sterling with 3126 cat replaced injector now drives
1999 sterling with 3126 cat replaced injector now drives fine until 2 miles down the road I think it's going into limp mode flash codes 36,66,16,13,39 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I'm having an issue with a 3126 cat motor in a c8500 truck.
Hi, I'm having an issue with a 3126 cat motor in a c8500 truck. It was missing pretty badly under no load and load at part throttle. Had the injectors tested and two were bad. We replaced those two an… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1999 kw with a c12 in it. 2ks08096 I did an in
I have a 1999 kw with a c12 in it . 2ks08096 I did an in frame on it and put reman injectors and new cam. It has 80psi fuel pressure at idle and up to 140 at 1800 rpm driving. It just doesn't have any… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Cat Man 1999 Ford Sterling 3126 cat. Evidently lost fuel
Hi Cat Man 1999 Ford Sterling 3126 cat. Evidently lost fuel prime(even though 4" in tank) as the secondary filter was not full of fuel. hand primed until i had fuel coming out of the fitting opposite … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a cat c12 I have a issue where it sounds like I have
I have a cat c12 I have a issue where it sounds like I have air in my fuel things I done replaced all fuel lines suction and return fuel regulator transfer pump fuel lines from pump to ecm fuel lines … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a 2003 Sterling enclosed car hauler that was built by
Hey I have a 2003 Sterling enclosed car hauler that was built by boydstun. It's a 10 speed & has a C12 in it. I bought the truck from wagoners trucking they had it sitting almost 7 years. I have gone … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I just replaced a c12 short block in a 2000 Kenworth truck.
I just replaced a c12 short block in a 2000 Kenworth truck. now I'm getting code 190-12. The sensor and wiring are good, but I now have a 1/4" gap between the sensor and the crankshaft gear. I reused … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2003 peterbilt 379x, C15, 6NZ. 18 speed, 3.70
I have a 2003 peterbilt 379x, C15, 6NZ. 18 speed, 3.70 diffs. Engine rebuilt (CAT Platinum) 16 months ago. Engine pops/stumbles under load. Stop truck at traffic light /slow to go around curve/ park o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a c12 cat in a 2000 sterling. was running fine then
i have a c12 cat in a 2000 sterling. was running fine then it just shut down. now it turns over but wont run. replace computer will not hook up to ecm. took ecm off and had local dealer hook up to it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
We have a 1999 Chevrolet C6500 with a caterpillar engine.
We have a 1999 Chevrolet C6500 with a caterpillar engine. There is diesel in the coolant. Are you familiar with this engine and do you have any ideas of what may be wrong?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have 2012 international Prostar with MAXXforce. fuel in
I have 2012 international Prostar with MAXXforce. fuel in tanks do not remain equal. here's the history of this gost problem. first it started with driver side fuel tanks blowing fuel overflowing and … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
2002 cat c12 what kind of horse power and torque kind I get
2002 cat c12 what kind of horse power and torque kind I get out of this engine and at what RPM's and what is the highest rpm I should run engine for the day? I do local gravel truck 25tons worth every… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
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