From: larso
Email: l_porsche@hotmail.com
Date: 01 Jul 2001
Time: 14:42:09check valve is in th fuel pump on the OUTLET side, you cant buy the check valve anywhere that I have looked, you have to buy the whole new pump.
The accumulator or warm up regulator is usually the culprit in these cars, or both.
Other things are leaky injectors, check valve, and stuff.