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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4377
Experience:  Owner at DJ Wilson
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8.3 cummins caps engine.runs awhile a hour then looses rpm,s

Customer Question

8.3 cummins caps engine.runs awhile for about a hour then looses rpm,s from 2350 to 1900.goes up and down.we have changed injection pump with no help.found that the fuel return line was crimped.replaced line with no better results. air hose going to turbo did have a cut in it,replaced hose with no better results. no codes are coming up, but it lacks horsepower after running about a hour.
Submitted: 11 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 11 months ago.

Hi my name is***** will be glad to help. There is a lot of known problems with the Caps style fuel system. It is best that I give you the troubleshooting guide so you can run through the tests to isolate your problem since you have no codes. Click this link below.

Troubleshooting