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03 chevy avalanche 5.3L 1/2ton 4wd


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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 24, 2013, 6:02 AM

Post #26 of 29 (1717 views)
Re: 03 chevy avalanche 5.3L 1/2ton 4wd Sign In

I agree with that.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



wrenchdawg
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Apr 24, 2013, 9:31 AM

Post #27 of 29 (1715 views)
Re: 03 chevy avalanche 5.3L 1/2ton 4wd Sign In

Right. Something is causing this pressure drop. I dont know that much about this electronic throttle but if I keep my foot on the pedal at 1000rpm its smooth. But the fuel pressure still doesnt come up to specs.
How much does the TPS control fuel flow? It will run fine as long as the idle is up. As soon as I release the pedal the idle drops way below spec and it dies. The whole time though I never get a rise in fuel pressure. Im really starting to lean towards the TPS. Anyone have input on this beast?


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Apr 24, 2013, 9:56 AM

Post #28 of 29 (1712 views)
Re: 03 chevy avalanche 5.3L 1/2ton 4wd Sign In

Did you clean the throttle bore and plate?





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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 24, 2013, 3:26 PM

Post #29 of 29 (1707 views)
Re: 03 chevy avalanche 5.3L 1/2ton 4wd Sign In

Get off the fuel pressure and TPS. They are not causing your stalling.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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