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Aerkuld Aerkuld is offline
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Join Date: Oct 2006
Location: Bay Area, SF, CA
Posts: 2,543
Pure guess, but would the fuel pressure regulator be diverting too much fuel away at high pressure i.e. low rpm?

If it was a flow limitation such as a blocked filter I would expect you to have a misfire or lack of power at high rpm, not at idle. If the pressure regulator was opening too far when the pressure got too high and you weren't developing sufficient fuel pressure in the fuel rails then I can see that it might give you starting and idle problems.

The problem I see with this is that I can't see how you would get normal fuel pressure back again unless the regulator sticks open once open or returns too slowly...

Like I said this is a pure guess as I don't know how the pressure regulator works.
2002 996 Carrera - Seal Grey (Daily Driver / Track Car)
1964 Morris Mini - Former Finnish Rally Car
1987 911 Carrera Coupe - Carmine Red - SOLD :-(
1998 986 Boxster - Black - SOLD
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Last edited by Aerkuld; 11-26-2007 at 05:45 PM..
Old 11-26-2007, 05:36 PM
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