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Registered
Join Date: Jun 2010
Posts: 1
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hot engine will not fire
my 1987 3.2 starts first time from cold even after 12 months storage.
Runs well and performance is fine. Once the oil has warmed up properly if you turn it off and then try and restart it will crank until it flattens the battery but will not fire. Its as if something is sticking, could it be the aux air/ cold start valve? |
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06-09-2010, 06:28 AM
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Join Date: Oct 2005
Location: Capistrano Beach, Ca.
Posts: 7,235
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Cold start valve is not part of a warm start so that is out of the equation--unless there is an electrical problem which does cause it to activate resulting in flooding but that's not likely. Have you checked for spark during warm starts? Do you have a DME relay on your car? (if this sounds dumb, I'm sorry but I'm not familiar with later cars.) Even if you fuel accumulator is bad or check valve is bad, you should be able to get a start without draining the battery. I'd guess a fuel pump/electrical problem, followed by ignition.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip |
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06-09-2010, 08:19 AM
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^ What ossieblue said ^
When was the check valve last changed? Thats a quick and cheap maintenance item that is often forgotten about.
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'75 911S 3.0L '75 914 3.2 Honda J '67 912R-STi '05 Cayenne Turbo '99 LR Disco 2, gone but not forgotten |
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06-09-2010, 08:34 AM
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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how long does it have to sit after it is warm before it will not start? IE, can you get it hot, turn it off then start it right back up or does it have to sit for say 20-30 minutes before it will not start. for me, its about enough time to eat lunch.
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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06-09-2010, 09:14 AM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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DME relay jumps to mind,....
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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06-09-2010, 11:29 AM
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Join Date: Dec 2003
Location: Centreville, MARYLAND
Posts: 938
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Speed sensor may be out of adjustment.
Worth a look-cee 
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Old Tee all 911s sold |
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06-09-2010, 11:33 AM
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Helga
1975 Porsche 914
