The fuel pressure on my 1986 CamaroZ28 TPI 305 is good and fine while running, but if you turn the car off the pressure drops at about 2/psi a second. Like if you came back in 1 minute it would be down to zero. does this mean there is a leak some where or my afpr is leaking or is this normal?

thanks,
Blue

 

Sounds like one or all the injectors are leaking.

 

fuel pump check valve not working. or an injector leak. to figure out which one do this. have a gauge hooked up. while running, have someone clamp the feed line off at the rubber part. as soon as they get it clamped, shut the car off. it the pressure stays, then check valve. it it goes down still, then injector. thats how i figured out mine. now i just need to get another pump.