Now what?

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Livebai8

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I've got a new issue with my 2002 Tahoe LS 5.3l...when in turn on...it seems like it's starving for gas...wont idle or chugs at a very low idle...i can give it gas and it sounds great...but as soon as i let off the gas...it dies.

I cleaned my MAF, checked my air filter. Could it be a fuel pump issue?

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wjburken

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I've got a new issue with my 2002 Tahoe LS 5.3l...when in turn on...it seems like it's starving for gas...wont idle or chugs at a very low idle...i can give it gas and it sounds great...but as soon as i let off the gas...it dies.

I cleaned my MAF, checked my air filter. Could it be a fuel pump issue?

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I think you need to get a gauge on the fuel supply to see what you’re getting for fuel pressure.

Did you let the tank run empty or very low recently?
 
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Livebai8

Livebai8

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I think you need to get a gauge on the fuel supply to see what you’re getting for fuel pressure.

Did you let the tank run empty or very low recently?
Not low enough for the low fuel light to come on. It's wierd...im not throwing any codes...i have 217k...before all this...i replaced my knock sensors and cleaned all fuel injectors and rail. It ran fine afterward...if I give it gas it runs fine??

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jeffsyukon

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Check for vacuum leaks. Maybe a hose was left off after the knock sensor replacement.

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Livebai8

Livebai8

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Check for vacuum leaks. Maybe a hose was left off after the knock sensor replacement.

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Roger that...its been a snowball of shit happening..i was rolling down the highway Sunday evening when my cluster lit up...battery was dead...reduced engine power...over heating...got off the freeway into a bowling alley parking lot...open the hood to see my serp belt was shredded...luckily I had my tools with with me...called my wife for a quick rescue and run to autozone...took more time to unravel the shreds of belt birdnested behind the fan...finally got new serp belt on buttoned up and drove back to the house...no issues with the low idle...next morning starts and struggles to idle??

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ks03

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Factory air intake? May have only been on early trucks, but I remember some vehicles had a silencer where the vertical part that went down was molded out of a separate piece. If your belt hit that, it could crack at the joint and let air bypass the maf.

otherwise my first thought was leaking fuel pressure regulator
 
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Livebai8

Livebai8

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Factory air intake? May have only been on early trucks, but I remember some vehicles had a silencer where the vertical part that went down was molded out of a separate piece. If your belt hit that, it could crack at the joint and let air bypass the maf.

otherwise my first thought was leaking fuel pressure regulator
Hmmm...it was dark and i was too close to a homeless camp so I wrapped it up and bailed. I'll take a look at both though.

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Livebai8

Livebai8

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Hmmm...it was dark and i was too close to a homeless camp so I wrapped it up and bailed. I'll take a look at both though.

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And yes...factory air intake.

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Livebai8

Livebai8

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I think you need to get a gauge on the fuel supply to see what you’re getting for fuel pressure.

Did you let the tank run empty or very low recently?
I started her up today and on cold motor the idle was about 500-700 rpm right off the bat...when I gunned it and let off it immediately dies. I bought this tester but not sure I have the right one to attach to the fuel rail to test fuel pressure...i pulled the vac hose and it atleast idled...but when I put back on it dies immediatley.

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Livebai8

Livebai8

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I started her up today and on cold motor the idle was about 500-700 rpm right off the bat...when I gunned it and let off it immediately dies. I bought this tester but not sure I have the right one to attach to the fuel rail to test fuel pressure...i pulled the vac hose and it atleast idled...but when I put back on it dies immediatley.

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Is this the right tester for me?58f3558973aeea2d96a7a222a02a90a4.jpg7a441702cd9e34f1100cdca83af19423.jpg

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