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- - Fuel pressure (https://67-72chevytrucks.com/vboard/showthread.php?t=850032)

PDW HOTRODS

01-20-2024 11:38 AM

Fuel pressure

Can anyone tell me what the fuel pressure should be for a 2007 Chevy Classic with 5.3 vin Z? I am trying to fix codes p0172 and p0175. My pressure is 54 psi with engine off and 60 psi with engine running. Running it is bouncing fast. Long term fuel trim is -19.5 both banks. New MAF and air filter. Thanks.

Bob B.

01-23-2024 01:46 AM

Re: Fuel pressure

Fuel pressure is supposed to be 55-62 psi engine running, and it should not drop more than 5 psi after you turn the engine off for at least 1 minute.

RustyPile

01-24-2024 05:14 PM

Re: Fuel pressure

I'd be looking at the pressure regulator and faulty/dirty injectors.. Here's a link for you...

https://www.bing.com/search?q=po172+...CTS&showconv=1

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