87 Porsche 944 No Fuel Pressure After start

[bdodd444]

I posted a while back about my 87 944 not starting. I finally towed it in, and after about $800 in tune up, draining old fuel and both Crank Position Reference Sensors. The mechanic says the car will turn over but once the key is released it loses fuel pressure and won't continue running. He says he is stumped and it will be 6 hours of labor at least to figure out what is going on. He says the fuel pressure is fine for starting but there is none for running. He says there are two different signals sent to the fuel pump. I believe I have all of this right. If anyone has any ideas, I would appreciate it. I'm pretty close to donating the car, but would be willing to try one more thing.

Edited December 10, 2009 by bdodd444

[wvicary]

Best advice I can give is find another mechanic. The fuel pump relay needs to see a engine speed signal to energize as well as a crank signal. It sounds like your missing the speed signal.