Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
My IAP has no ground and the wire is good to ECM and ECM is
My IAP has no ground and the wire is good to ECM and ECM is good were could the problem be? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
I have a 2014 Freightliner. I first got the code spn 523318
I have a 2014 Freightliner. I first got the code spn 523318 fmi 6 that had to do with HVAC. It also said it was derated at 25%. Then the truck just wouldn't start. When roadside come out, they said ab… read more
Roy
Roy
shop foreman
Associate Degree
5,280 satisfied customers
Can a Cat Huey pump have too much oil pressure to the
Can a Cat Huey pump have too much oil pressure to the injectors? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
Well we just rebuilt the motor. and now it wont start. i
well we just rebuilt the motor. and now it wont start. i believe that we have track it down to a fuel issure. it will try to start like two or thee injectors fire but not enough to keep it running … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
9,360 satisfied customers
I have a 2012 ford f750 with cummins 6.7 problem with
I have a 2012 ford f750 with cummins 6.7 problem with starting without priming as you try to start or starting fluid. runs ok until you cut off and have to do the same over to start … read more
Roy
Roy
shop foreman
Associate Degree
5,280 satisfied customers
I'm trying to narrow down a cat c7 running rough/missing
Hi, I'm trying to narrow down a cat c7 running rough/missing problem. It has an intermittant code(###) ###-####which flashes at idle but not while revved or driving. I have a pressure guage in the oil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
We have a 3126 sn CKM34634 it came into the shop running but
we have a 3126 sn CKM34634 it came into the shop running but smoking bad. We found coolant temp sensor was bad , that took some of the smoke away, we thought possible injector seals. We removed the in… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
2005 Ford F750 Cummins 5.9L ISB, Under full throttle, power
2005 Ford F750 Cummins 5.9L ISB, Under full throttle, power will drop off and the truck will buck. If you ease off the throttle, it will smooth out. The issue comes and goes.Getting codes PID 94 FMI 1… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
Have complicated and unusual case. Brand new FMM26704 Cat
Brand new FMM26704 Cat was installed replacing KAL48257 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
CAt c7 in 2006 f750 crank no start wont start on starting
CAt c7 in 2006 f750 crank no start wont start on starting fluid checked voltage at huiu pump - 11.6 volts fuil filter full… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
I am currently working on a ford truck with a cat c7 engine.
I am currently working on a ford truck with a cat c7 engine. Cranks but no start. Numerous parts have been replaced but still the tuck will not start … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
I have a 2008 f650 with the cat c7 r head motor. 120k miles. Starts pe
I have a 2008 f650 with the cat c7 r head motor. 120k miles. Starts perfect. Idles perfect. Revs up perfect. After about 30-45 seconds it shuts off. Just like you turned off a switch. It will restart … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
Hi, I have a 2008 f750 with a c7 cat serial# (c7so4615). The
Hi, I have a 2008 f750 with a c7 cat serial# (c7so4615). The local cat dealer checker it out and told us it needed a hi oil pressure pump. We replaced the pump today and the truck won't start. I conne… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
Caterpillar 3126/C7 Engine Issues. The following enine is in
Caterpillar 3126/C7 Engine Issues. The following enine is in the shop with failure issues. Can you advise as to perhaps why engine has continual engine issues? Here is a history of engine issues in th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
What is making the huei pump only produce 500 psi until I unplug
What is making the huei pump only produce 500 psi until I unplug the injection control pressure sensor on top the head. With it unplugged the huei pump will put out 5000psi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
OK ON SAME ENGINE I HAVE REPLACED ALL SIX INJECTOR ORINGS ,INJECTOR
OK ON SAME ENGINE I HAVE REPLACED ALL SIX INJECTOR ORINGS ,INJECTOR ACCUATOR SENSOR AND I HAVE REPLACED HUEY PUMP BUT ENGINE IS STILL RUNNING ROUGH AND SMELLS LIKE BURNING RAWL FUEL AND LOOKS LIKE FUE… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
C7 Cat getting fuel in oil. Already have resealed injectors...30
C7 Cat getting fuel in oil. Already have resealed injectors...30 day ago huei pump and transfer pump were replaced. no fuel coming from transfer pump. Good flow from pressure relief valve to fuel tank… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
thank you i can imagine that is probably the case ... now
thank you i can imagine that is probably the case ... now if the presure regulator is good .. should the fuel presure flucuate between 65 and 85 or be at a steady presure?also as far as you can tell f… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,965 satisfied customers
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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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