Medium and Heavy Trucks

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We have a 1994 International 4900 with a dt466 engine. Came
we have a 1994 International 4900 with a dt466 engine. Came in with issue of no power . Starts great idles great step on it and it coughs and sputters for about 20 seconds smoking all the way, then fi… read more
james Roberts
james Roberts
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Vocational, Technical or Trade School
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I got 2007 freightliner Columbia coming these error, We
I got 2007 freightliner Columbia coming these error , We changed the turbo because it was leaking oil in turbo and was throwing heavy black smoke and also changed egr valve it was struck open . Now ev… read more
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Bradey V
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89 mack 300 front of injection pump on mounting housing air
89 mack 300 front of injection pump on mounting housing air valve air leaking from relief holes. … read more
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Wayne
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Cat c15 twin turbo acert. Recently developed whistle at
Cat c15 twin turbo acert. Recently developed whistle at higher rpms under load. Replaced all cac boots, tested cac, no leaks. Took it to shop, the replaced all pulleys, noise quit for a day and then c… read more
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Cat Man
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Lost boost and now hoses on both sides of air intake are
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Have a 2011 mack with a mp8 engine whining sound from engine
Have a 2011 mack with a mp8 engine whining sound from engine at 25psi of turbo boost then it shoots up to 38psi of boost … read more
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Mike Mcmillan
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2007 mack with an MP8 engine.The customer brought it to me after spending over 20,000 at a mack dealer and having a delete done hoping it would fix his low power.i am not a Mack expert so it is a scho… read more
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Mike Mcmillan
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2000 Kenworth with Cummins n14. very low boost. when CAC
2000 Kenworth with Cummins n14. very low boost. when CAC system is tested with intake makifold hose still hooked. i lose all my air from around the head gasket on the brakes compressor. how is that po… read more
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1993 mack truck ch-613 with a 400 hp .timing go to [email protected] full
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Wayne
Wayne
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Hey There; Loss of power while driving the interstate and idling at red lights. Truck restarts immediately. Dies agan within seconds to 5 minutes. We found codes on the odometer reading: … read more
Daniel Wilson
Daniel Wilson
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I have 2008 mack gu 713 dump truck with mp7, 85000 miles &
I have 2008 mack gu 713 dump truck with mp7, 85000 miles & each time it regens loose about half gallon of oil out of blow by tube. … read more
Daniel Wilson
Daniel Wilson
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I have a 1996 semi electronic Mack Truck. One of the heads
I have a 1996 semi electronic Mack Truck. One of the heads cracked. I replaced the head. It had an excessive amount of black smoke when you were pulling. I found a clamp loose on the air intake and ti… read more
Wayne
Wayne
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07 isx overheating. Replaced the water pump , replaced the thermostat, replaced the temp sensor , washed radiator with steamer and replaced egr valve as well , and replaced exhaust temp sensor as well… read more
Jeremy
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Hello I have a Detroit diesel S 60 14L ESN: 06R078622. This
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I have a 2000 Detroit diesel 60 in a 2003 freightliner. The
I have a 2000 Detroit diesel 60 in a 2003 freightliner. The truck has very low power in high range without a load-no misfire no smoke. Fuel psi at idle is 15, 35-45 midrange and maxes out at 70 psi ne… read more
spankyjr1
spankyjr1
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spanky, We are not working on a KW Series 60 ESN#06R0548395 It
spanky, We are not working on a KW Series 60 ESN#06R0548395 It looses power at higher RPM's. I unplug the air cleaner and fuel filter. replaced both. Still drops power at 1700 RPM no codes present. Ca… read more
spankyjr1
spankyjr1
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Hello my name is XXXXX XXXXX i am working on a school bus 2003
Hello my name is XXXXX XXXXX i am working on a school bus 2003 with a 466e engine i replaced the injector o rings because i found oil in the fuel tank that problem was solved but since then the engine… read more
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Andy
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i have a 2004 cx613 driver says it loses power for a few seconds
i have a 2004 cx613 driver says it loses power for a few seconds then it comes back.then the same thing happens allover again.had egr cooler cleaned,put in brand new actuator still does the same thing… read more
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Meet the Experts:

Daniel Wilson

Daniel Wilson

11,395 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

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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