1997 5.7 l vortec bogs after warm-up

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Nov 21, 2009 | 09:55 AM

Themajickman

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Joined: Nov 2009

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1997 5.7 l vortec bogs after warm-up

Hello, first of all I'd like to say that I have scoured these forums for a solution to my problem and haven't found anything that could help. I am a quadriplegic and I don't drive but I am writing this to help my son who has a 1997 GMC Sierra 1500 with a 5.7 L vortec engine with 180,000 miles on it. The truck starts and runs fine until it warms up. After that, you can get the RPM up if you slowly work the accelerator but as soon step on it, the engine just bogs down until you back off the accelerator. It almost seems like it ran out of gas. He has replaced the fuel pump, fuel filter, the ignition module. It's not throwing any codes. Needless to say this is very frustrating and the truck is basically useless under these conditions. He isn't a mechanic and is unemployed at the moment so he just can't start throwing money at it. Any help that I can get here on this forum would be greatly appreciated. Thank you, Paul