on my 2000 z28 camaro the fuel pressure goes up and down and will stay at like 15 pounds but if i play with gas pedal it will go back up to 55 and then eventually drop back down i have replaced pump like 250 miles ago with a wallbro 255 so if anyone thinks they know whats goin on it would help thanx

 

bump for this guy...I see you found the forums..

 

Sounds like it could be a regulator. When you turn the key to acc will it hold pressure?

 

yeah it holds pressure its been doin it ever since i got the car i dont know if when i put the new pump in if it even fixed it but it definitly quit doin it for a while

 

Did you replace the filter also?

 

yeah sure did

 

might have a bad connection on the wires.behind underneath the backseat.