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Fuel starvation?

 
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poor-sche  



Joined: 06 Jan 2017
Posts: 17
Location: Los Angeles, CA

PostPosted: Tue Dec 12, 2017 8:30 am    Post subject: Fuel starvation? Reply with quote

Hello All,

I've owned my 931 for a little over a year now with virtually no issues. Not sure if this was due to good luck or I somehow found myself a good example (which would also be good luck). I use the car occasionally on the weekends; that is to say, it doesn't get used much at all.

Anyhow, yesterday I took the car for a spin. I was on the freeway cruising at around 70 mph for approximately 5-10 min when suddenly, I can feel the car losing power. I pulled over and the car dies completely. I turn the key and the car fires back up like nothing happened. I pull off the freeway and start driving back home using streets. About 5 min. later it happens again and once again it fires right back up. The rest of the way home, I was wringing it out every chance I got, but it never shut off again.

It felt like it was being starved of fuel, but I do remember smelling a slight rich fuel smell come into the cabin each time it happened. I believe the car has a wide band sensor installed, but no A/F gauge.

Thoughts?
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morghen  



Joined: 21 Jan 2005
Posts: 7872
Location: Romania

PostPosted: Tue Dec 12, 2017 7:27 pm    Post subject: Reply with quote

Is it an S1 or S1? your signature says S1 but better be sure.
If its an S2 then DITC connection.

If S1 perhaps ignition box connection(front wheel well) or fuel pump on its way out(I heard mine stop and car died a couple of times just like yours) or its just the fuse that's corroded or not having proper contact or the pump wiring at the pump is corroded and not properly secured....or the fuel pump relay is on its way out or its terminals a bit corroded.

have a check on those...in my case it was just the fuse that was not seated properly and it developed some corrosion so I just cleaned it and lived on since
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poor-sche  



Joined: 06 Jan 2017
Posts: 17
Location: Los Angeles, CA

PostPosted: Wed Dec 13, 2017 5:02 am    Post subject: Reply with quote

Yes, it's an S1.

Thanks for your suggestions. As far as I know, the car has lived it's entire life in Southern California and has Zero signs of corrosion, but I'll check regardless. Since I bought the car, I've noticed the fuel pump buzzes pretty loudly (you can hear it both inside and out with the car running). Is this normal?
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Paul  



Joined: 02 Nov 2002
Posts: 9344
Location: Southeast Wisconsin

PostPosted: Wed Dec 13, 2017 6:58 am    Post subject: Reply with quote

My 1980 931S (long gone) did this years ago, in my case it was caused by the fuel filter being installed backwards by the PO.
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1556
Location: MI

PostPosted: Wed Dec 13, 2017 10:52 am    Post subject: Reply with quote

Add checking the overboost switch and it's connection to morghens nice list..
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morghen  



Joined: 21 Jan 2005
Posts: 7872
Location: Romania

PostPosted: Wed Dec 13, 2017 9:46 pm    Post subject: Reply with quote

Fasteddie313 wrote:
Add checking the overboost switch and it's connection to morghens nice list..


jesus, how did I miss that? lol
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