Medium and Heavy Trucks

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We have a c13 cat with low power. we have replaced boost
we have a c13 cat with low power. we have replaced boost sensor, verified fuel pressure (85psi) at wot. the truck originally came in with center section of exhaust manifold and turbo burned out. drive… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
3406 cat engine has black smoke and won't drive more than
3406 b cat engine has black smoke and won't drive more than 30mile I replaced turbo on the road still the same per hour … read more
Joel Bos
Joel Bos
909 satisfied customers
379 falls on its face whenever you get to 7th gear- then
379 falls on its face whenever you get to 7th gear- then almost no power. Changed the fuel filters. Air filters look great. Any suggestions? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
C13 hesitates under throttle. Unresponsive turbo. 2006 9200i
Im hearing it's a bad wastegate but I can't seem to find it… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
We have a 2012 class 750 that has a regeneration code on it.
We have a 2012 class 750 that has a regeneration code on it. We change the air filter and still have the code … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I am working on 2 trucks that almost have a similar problem,
I am working on 2 trucks that almost have a similar problem, one is a gmc with a cat 3125 in it. It is hard to start and usually blows a lot of while smoke at start up and sometimes while driving. The… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have 1999. Kenworth T800 475 cat. 3406 E It's only making
I have 1999. Kenworth T800 475 cat. 3406 E It's only making about 15 psi boost - Low power - No codes in computer - I changed fuel filters and air filter and also checked air charge boots and tried to… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
Have a cat C13 leaking coolant out of the overflow bottle.
Have a cat C13 leaking coolant out of the overflow bottle. Replaced radiator cap, removed head and sent out to machine shop (no issues found). Replaced head gasket and unit still continues to push coo… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a cat c13 and it's already been 3 times that we
I have a cat c13 and it's already been 3 times that we replace the oil cooler ,Original problems was coolant in water and viceversa, the air compressor, water pump are been replace also , before the s… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a 2012 cascadia day cab the motor went out at 930k I
I have a 2012 cascadia day cab the motor went out at 930k I replaced the motor with a used DD13 same engine has no power after replacing runs very good but no pickup even as a bob tail had a Cl engine… read more
Expert
Expert
5 satisfied customers
Have a 2004 c13 KCB engine Just lost all turbo boost. no
Have a 2004 c13 KCB engine Just lost all turbo boost. no power but engine sounds good … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
2006 Freightliner c13 cat oil pressure shot up to 75 going
2006 Freightliner c13 cat oil pressure shot up to 75 going down the road bout a week ago but it would come back to normal... back and forth.... now it's tryna read low bout 20 idling and 30 going down… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Cat c13 KCB idle runs perfect but on the road has no power
Cat c13 KCB idle runs perfect but on the road has no power at all no codes so you think that I got a turbo problem… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I own a truss plant and one of our delivery rigs is a 2007
I own a truss plant and one of our delivery rigs is a 2007 western star with a c13. It started not having any power going up hills about a week ago. We took it to the shop that usually does our work. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a Cat MBN engine that will build boost the 1sttrip
I have a Cat MBN engine that will build boost the 1sttrip out-then the check engine light will flash and the boost drops the rest of the day. Hooked up the Cat ET no codes shown but had shown the 102-… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a C13 that seems to smoke only when the engine brake
I have a C13 that seems to smoke only when the engine brake is applied it is down on power and is showing a 385-1 code in history but not active. We replaced number 5 injector as it was smoking all th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Hallo Cat man, We have some problems with a C9 engine. It
Hallo Cat man, We have some problems with a C9 engine. It runs perfectly when no load but not when putting some load ( a turbine ) when engine is at 1800 RPM. The RPM drops a lot when under load. When… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a 94 kenworth t800 with 425HP 3406B cat. Serial prefix
I have a 94 kenworth t800 with 425HP 3406B cat. Serial prefix 3ZJ. I'm having a fueling or timing problem I believe. It has developed a miss and lost power. Has new nozzles . After idling for short ti… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 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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