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Architecture & Porsche's
Join Date: Jan 2006
Location: Austin, Texas
Posts: 3,189
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ignition issues: 965 won't run: feels like extremely weak ignition
Checked wires, plugs, replaced distributor/cap/rotor, checked for dirt/debris on crank trigger, checked ignitor plugs, crank trigger plug: at a loss.
Car starts ok, but hard to get "running" like the fuel is extremely cut back. Fuel filter is fresh, pre-filter in tank is clean. When it's running poorly & i'm actually driving it, on deceleration you can hear loud(er) popping from the exhaust, like unburnt fuel is igniting post-turbo. Running out of things to check: thoughts?? :/
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Porsche Club Racing National Scrutineer '89 Andial 951 '82 928R '74 911 RSR 3.6 |
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08-31-2010, 11:05 AM
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Registered
Join Date: Jul 2004
Location: Texas
Posts: 180
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Mark, are both fuel pumps running? Can you check the control pressure to the fuel distributor?
Warren |
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08-31-2010, 08:07 PM
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Insert Tag Line HERE.....
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Has anything been done to the car from when it was running good until now? (like new parts installed, new wires, valve adjustment, fuel filter, etc..) Or did it all of a sudden just start running bad?
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09-01-2010, 01:48 PM
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Architecture & Porsche's
Join Date: Jan 2006
Location: Austin, Texas
Posts: 3,189
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No new maintenance or anything, just started acting funny: I'm way overdue for my WUR to be rebuilt but until Brian L has a core, I can't send mine off yet; so, I thought it was my WUR until it became apparent that it was worse: it started doing it at idle, then progressed into cruising too.
Mark. (I'll pull each fuse tonight & see if it starts on one pump for both pumps) Does anyone know if the car will run for crap with only one pump running? I assume the non-functional pump would serve as quite a restriction...
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Porsche Club Racing National Scrutineer '89 Andial 951 '82 928R '74 911 RSR 3.6 |
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09-01-2010, 02:00 PM
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Bandwidth AbUser
Join Date: Nov 2001
Location: SoCal
Posts: 29,522
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It sounds like it's running rich from your description. Bad O2 sensor?
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Jim R. |
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09-01-2010, 03:23 PM
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Architecture & Porsche's
Join Date: Jan 2006
Location: Austin, Texas
Posts: 3,189
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It appears that as soon as the idle starts to stabilize, all goes to he'll, as is it's switching to another mode/o2 emulation mode & then the ignition goes ultra weak: breaking out the manual now to see what I can pinpoint
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Porsche Club Racing National Scrutineer '89 Andial 951 '82 928R '74 911 RSR 3.6 |
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10-03-2010, 02:42 PM
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78 Porsche 911 Turbo
1972 porsche 72 rsr clone
1995 porsche 993
1995 porsche 993
1990 porsche C2 911
1966 porsche 911
1984 Porsche 911
2003 Porsche 996
