Working on a project car and having some problems. It will turn over and wont start I have scanned it with no trouble codes.
So I started with the normal (spark and fuel) I'm getting spark but when I check the fuel pressure I get 40 psi when I turn the key on.
Now after the pump primes and it sets a few seconds the pressure will drop around 30psi or so. Is this normal or should I be looking for a leak?

I pulled the fuel rail off and primed it to see if any of the injectors are leaking and let it set for a few hours and they seem fine.

If it only drops to 30 PSI, and holds, should not prevent starting. Cycling the key quickly a few times before turning it to “start” will usually minimize the loss of pressure. Pressure loss can also be the result of a faulty check valve in the pump, a leaking fuel pressure regulator (check for fuel in the FPR vacuum line) or a leaking line, including the flex line in the tank.

Do you have a noid light, or a stethoscope to check whether the injectors are pulsing? Or if you still have the rails off, put a jar under each injector and BRIEFLY watch for injector pulsing when it’s cranking. Do that outside, no flames, minimum possible time, and have the proper extinguisher handy.

The PCM will not turn the fuel pump back on when you turn the key to start, unless it gets the fuel enable signal from the theft deterrent module.

See if you can trace the pink wire for the driver side back to connector C100, pin A:

courtesy of Shoebox

http://shbox.com/1/1995_pcm3.jpg

1995 Z28 A4 Engine Harness