diezelraccoon
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- Joined
- Jun 18, 2024
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I have an 03 Tahoe with the 5.3 Flex Fuel engine. Check engine light came on today and it is throwing a P0174 and P0171 code.
A few weeks ago I checked the fuel pressure and it was as follows and with what I have found is below spec. I was lead to check this because when it gets low on fuel it sometimes takes a few extra cranks until it starts.
46 psi when key was on but engine off.
42 psi with engine running
42 psi after engine was off
I am assuming I am get this this code because of the fuel pump? Which is fine because I already had ordered a new OEM fuel pump.
A few weeks ago I checked the fuel pressure and it was as follows and with what I have found is below spec. I was lead to check this because when it gets low on fuel it sometimes takes a few extra cranks until it starts.
46 psi when key was on but engine off.
42 psi with engine running
42 psi after engine was off
I am assuming I am get this this code because of the fuel pump? Which is fine because I already had ordered a new OEM fuel pump.