Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I'm working on a c15 acert engine with no power. Fuel
I'm working on a c15 acert engine with no power. Fuel pressure is at 75 psi running down the road. Boost pressure on cat et is 0 psi but on mechanical gauge is 12 psi. Tested the cac and it was leakin… read more
Bradey V
Bradey V
Certificate
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
207 satisfied customers
475 acert low boost went from 50 lbs to 30 sometimes gets 32
475 acert low boost went from 50 lbs to 30 sometimes gets 32 but falls back about 10 lbs when you step on throttle it's in a 07 Pete and it's a mxs … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
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C15 cat, boost sensor was replaced at cat dealership and
C15 cat, boost sensor was replaced at cat dealership and truck had 60 pounds of boost the day I picked it up, drove home cut truck off and the next day it wouldn?t get over 30 psi, every once in a whi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2006 379 pete with a mxs68502c15 cat and the boost
I have a 2006 379 pete with a mxs68502c15 cat and the boost psi drops from 45psi to 25psi in high gear and wont go over 25psi boost after going thru the gears then you can stop cut the truck off resta… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
2004 cat acert c15 Diesel engine over heats only when boost
2004 cat acert c15 Diesel engine over heats only when boost pressure reaches over 30 psi with light loads and 17 psi with heavy loads. No coolant loss or oil. Compression is good on all cylinders. Wil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2006 NXS Acert engine with over 1.3 million miles.
I have a 2006 NXS Acert engine with over 1.3 million miles. It's getting old and worn out, alot of blow by, and is using a gallon of oil every 6k-8k miles. I know a rebuild is in the future. I'm fed u… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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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
207 satisfied customers
Cummins 400 ISl Oil Spray Just picked motorhome up from
Cummins 400 ISl Oil Spray Just picked motorhome up from repair shop after: air dryer filter replaced, turbocharger replaced, new oil, oil filter, air filter and front cover resealed. Drove 25 miles an… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
I have a C 15 acert BXS that is derating. It does not throw
I have a C 15 acert BXS that is derating. It does not throw a check engine light but will not pull over 30 lbs on the turbos. The fan will run off and on constantly all day long pulling an empty trail… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Are you familiar with cummins ism? Im having a problem with
Im having a problem with my truck so what do i do? I dont know how this works … read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
524 satisfied customers
We have an 07 pete with c15 acert its pushing antifreeze out
we have an 07 pete with c15 acert its pushing antifreeze out the overflow but only when the turbo boost is above 40 lbs head and head gasket has ben replaced cat has put it on dyno and nobody can find… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
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I am working on a sdp acert engine. Turbo boost not reaching
I am working on a sdp acert engine. Turbo boost not reaching max. Sometimes it will reach 40psi and drop back to about 32 psi… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,059 satisfied customers
2006 c-15 accert, has exccesive blow by,loosing a lot of oil
2006 c-15 accert, has exccesive blow by,loosing a lot of oil out blow by tube,engine sounds and runs good,we have been told that it could be turbo boost back into crankcase,or compressor issues,cracke… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have 2005 peterbilt 379 with cat acert eng sometime I have
I have 2005 peterbilt 379 with cat acert eng sometime I have bust an sometime I don't ?????… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Hey my 04 Detroit 60 is coughing aand sputtering and blowing
Hey my 04 Detroit 60 is coughing aand sputtering and blowing light blue smoke now and then and at the same time the turbo seems like it won't spool up. It tries to pressure up but get to 10 psi then d… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 satisfied customers
I have a 2006 Cat C-15 ACERT Twin Turbo. Just had the top
I have a 2006 Cat C-15 ACERT Twin Turbo. Just had the top end rebuilt 15,000 miles ago 970,000 on odometer. This morning the truck was sluggish. 0 psi on turbo boost. and 0 cfm on air filter suction. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

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Owner at DJ Wilson

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I am ASE Master Truck Certified.

Wayne

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

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

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Curtis B.

Curtis B.

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Chris (aka-Moose)

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353 satisfied customers

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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