Good morning, Im new to here, and i have a 99 silverado with a 5.3 with 251k miles on it. I have all the symptoms of a bad fuel pressure regulator except my check engine light doesnt come on. Sometimes when i start it i have to pump it a few times to get it to run and then it runs at like 500 rpms and misfires, and if i try to take off the misfires get worse. If i let it sit and run for a few minutes its goes away and drives fine, until i have to start it again. Its a stock truck, no performance add ons, i have it serviced regularly. Any help would be appreciated
Champagne99
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