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Registered User
Join Date: Jan 2005
Location: virginia
Posts: 148
Fuel problem

My 85 930 has been idle for 6 months. Upon attempting to start it (several 20 second cranks), it ran very roughly, coughing and smoking. After 30 seconds of this unusual behavior, I cut it off to look for anything obvious. What I discovered was raw gas dripping from a pin hole in the muffler!

The car has 68,000 miles, and has run flawlessly until its recent period of storage. I would appreciate the board's thoughts on where to begin looking.


Old 11-29-2006, 03:47 AM
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mark '87 930's Avatar
Join Date: Feb 2006
Location: Toronto, Ontario
Posts: 727
Mine seems to do that when it is really cold out. they are made to run rich when cold, or at least until it is warm.. I'm not certain how rich though.

just to give you an idea, I disconnected my second fuel pump while the car was running but I had just started it (I did that by simply removing the relay in the front) and the car started running smooth! If I reconnect the relay, the fuel pump comes back on, and the car runs rough again.

That to me indicates a WUR problem, it sends too much gas when cold. (or would that be the other way around as the pressure is higher with the second pump on and the fuel distributor pin is not moving as freely?)
1987 930
1956 Chevy 3100
2009 Subaru Forester
2003 KX250 X2(I like my toys!!)

Last edited by mark '87 930; 11-29-2006 at 06:11 AM..
Old 11-29-2006, 06:07 AM
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David's Avatar
Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 9,356
If the car is driveable, I'd take it out for a decent run and see if that doesn't clean it out before doing a bunch of trouble shooting.

It'd be a good idea to carry a decent fire extinguisher in case a fuel line fails.

2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 11-29-2006, 01:39 PM
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