12-15-2009, 04:12 PM
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#1
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Registered User
Join Date: Sep 2006
Location: Florida
Posts: 327
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Car stopped running...need a thought
My car ran ok till last week when it stalled. It would only stall @ a stop light w/the a/c on. Then it stalled w/o any accessories on & took a couple min of sitting & it started again. Today it did the same thing, couple min later it started, but ran w/a miss & eventually stalled again. Not it will start, but only for a couple seconds & then dies out. Only code showing is P0102...thing is I just put a new MAF in a few months ago. Could this be a MAF issue or maybe a fuel pump or filter issue, b/c it seems to being starved of fuel & that leads me to think it could be a bad fuel pump or clogged fuel filter.
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12-15-2009, 05:40 PM
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#2
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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What year and has any work been done on the car recently?
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
Last edited by Paul; 12-15-2009 at 06:15 PM.
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12-15-2009, 05:54 PM
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#3
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Registered User
Join Date: Sep 2006
Location: Florida
Posts: 327
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Its a '98 w/65k and no work other than a mass air sensor about 6 months or so ago.
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12-15-2009, 06:13 PM
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#4
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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When trying to start, is the starter turning the motor?
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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12-15-2009, 07:03 PM
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#5
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Registered User
Join Date: Sep 2006
Location: Florida
Posts: 327
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yes. it actually starts, but it just stalls out within 10-15 seconds no matter what I do to keep it running.
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12-15-2009, 07:08 PM
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#6
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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When it shuts down, does the tach slowly return to zero as the motor slows and stops, or does it fall to zero like a rock?
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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12-16-2009, 04:13 AM
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#7
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Registered User
Join Date: Sep 2006
Location: Florida
Posts: 327
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Slowly as best I can recall.
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12-16-2009, 10:02 AM
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#8
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Registered User
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
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Oxygen Sensor
Never had a problem on mine but my 04 Trailblazer did. Started running rough, die, hardly go. Turned to be a oxygen sensor. I believe it was upstream. :ah:
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12-16-2009, 02:47 PM
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#9
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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Quote:
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Originally Posted by pompous
Slowly as best I can recall.
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If it drops in proportion to the engine revs, it is probably not an electrical issue.
I'd check the fuel pressure first.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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12-16-2009, 05:25 PM
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#10
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Registered User
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
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Just remembered
I had an issue with a Toyota one time, ran good but when you got going it seemed to run out of gas. Stopped and waited about 5-10 minutes, started up and would run fine and as soon as you got, say 50mph it would do it again. I had a friend that had worked at a Chevy dealership and he came with the idea that there was something in the gas line. We disconnected it from the tank and fuel pump. Took a higher pressure air hose to the line and a piece of plastic came out. After that never had another problem. :dance:
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12-16-2009, 07:18 PM
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#11
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Registered User
Join Date: Sep 2006
Location: Florida
Posts: 327
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Well, for what it is worth, for anybody who has a future issue like this, it appears to be a bad throttle idle air valve.
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