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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8953
Experience:  I am ASE Master Truck Certified.
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I have an 06 550 cat acert engine it runs descent in the

Customer Question

I have an 06 550 cat acert engine it runs descent in the beginning of a run for the day...by the end of my 600 mile day it's running an idling ruff
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 2 years ago.

Thanks for asking your question and requesting me. I will try and help you out.

Does the yellow check engine light come on when this happens?

Has it done this since the overhaul? Or did it just start?