View Single Post
WERK I WERK I is offline
Forced Induction Junkie
WERK I's Avatar
Join Date: Jan 2003
Location: Wisconsin
Posts: 3,291
Originally Posted by x98boardwell View Post

I was just reading this thread as I am having "cold start issues" and noticed your last post where you mentioned the check valve... I thought our cars did not have them. Mine is an 87.

Can you clarify?

Maxx1, did you ever figure this one out?

Thanks guys,
The check valve is located up front, connected to the output of the front fuel pump. If you have a faulty check valve, you will see the residual fuel pressure drop precipitously after the engine is shut off. There are specs in the Porsche shop manual for the amount of pressure drop vs. time. I'm on the road so I don't have access. Maybe someone else has spec?
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 10-31-2009, 08:26 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)