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After truck gets to operating temp the idle starts to surge…

Customer Question
After truck gets to...

After truck gets to operating temp the idle starts to surge at some will make idle go up to 1500 and back down a few times it has pulled a code p0191 so we changed the pressure sensor still had the problem then we changed the hi pressure pump assemble with a new pressure regulator still having same issue wont always throw a code and some times will run real irratic and have a fuel knock

Mechanic's Assistant: Are you certain it's the fuel pressure sensor that's in need of attention? What about the fuel rail? Have you checked it yet?

No

Mechanic's Assistant: What is the model/year of your Chevy?

2006 chev duramax diesel

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

Yes sensor first then pump with new regulator

Submitted: 7 months ago.Category: Chevy
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Answered in 1 hour by:
12/6/2017
Chevy Mechanic: Todd Audette, Chevy Technician replied 7 months ago
Todd Audette
Todd Audette, Chevy Technician
Category: Chevy
Satisfied Customers: 427
Experience: Chevrolet Technician
Verified

Hi my name is*****'m an A.S.E Certified Master Technician with 30 + yrs GM experience. I'm reviewing you question and would be happy to assist you.Please allow me a few minutes

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Chevy Mechanic: Todd Audette, Chevy Technician replied 7 months ago

You might want to try running some injector cleaner through the fuel rail and please review this G.M service bulletin for a possible cause

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Chevy Mechanic: Todd Audette, Chevy Technician replied 7 months ago

Any Luck

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