I just installed a 255lph pump in my 1994 zee. I have a 5.3 with a 1999 intake and throttle body and maf from the truck. My problem way before I replaced the pump to the 255lph , the car idles great, but once u stomp the accelerater it studders bad u have to slow into the throttle to get it up to 5000rpms. It falls on its face if you will. It has the Corvette fuel filter with the return on it. And I replaced the filter under the driver side with a new one and it got worse. I'm stumped????????

 

No Im stumped haha

 

Haha Stfu!! Lol

 

Maybe a plug or plug wire! Maybe there grounding out?