got a 93 lt1 replaced the fuel pump becuase it quite . car ran fine till the day the pump quite . i have replaced the fuel filter and the pump and car has no power cant get it over 25-30 mph . so took pump back and got another one figuring it mite be bad and still same thing i got 42 psi fuel pressure . any help would be great thanks

 

when are you measuring 42 psi ?

 

at idle and when vac. goes away it raises to about 48