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I have 2007 peterbuilt model 379 with cat c15 twin turbo…

Customer Question
I have 2007 peterbuilt...

I have 2007 peterbuilt model 379 with cat c15 twin turbo nxs, exhaust goes high up to 1200

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

Peterbuilt/ 379/ 2007/ cat c15 twin turbo nxs

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

Yes, I have changed air to air and high pressure turbo and also the piro temperature sensor

Mechanic's Assistant: Anything else you want the truck mechanic to know before I connect you?

Turbo boost up to 40 psi when the truck is pulling a heavy heavy load and as soon as turbo is boosting the temp goes up to 1200

Submitted: 3 years ago.Category: Medium and Heavy Trucks
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Answered in 7 minutes by:
8/16/2019
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
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Thanks for asking your question. I will try and help you out.
1200 is not to high. The max allowable exhaust temp is 1250 degrees FPlease reply back if you need more help. I am happy to assist.
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Customer reply replied 3 years ago
when ever its at 1200 i always down shift so it can probably go over 1250
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Thanks for the information. high exhaust temps can be caused by a plugged muffler or overfueling injectors.
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Cat Man
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