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Maxx1 Maxx1 is offline
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Join Date: Jun 2007
Location: Oh
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Originally Posted by mark houghton View Post
Since it wouldn't start with the oil temp at 170, I'm going to call this a warm car and say it has nothing to do with typical cold start systems. I think you're barking up the wrong tree.

My money would be on one of several things fuel related. Overboost switch, yellow overboost relay, and/or fuel pump relays/fuses. I suspect that your fuel pumps weren't running when she failed to start, and any of the above will keep them from running if faulty/dirty. Unfortunately it's sporadic when it happens and can be very frustrating to find the intermittent things are only discoverable when the car completely refuses to start. There is a ton of discussion on this topic.

Of course, I could be totally wrong and it may be a faulty WUR or ignition related. Next time it happens, first pray that you're not far from home and then do a quickie fault diagnosis to determine if you are getting fuel and spark. At least that will point you in the right direction.
I didn't take time to listen if the pumps were running. I would think that if they were working fine when I pulled into the gas station, what would cause them to fail upon restart? I'll have to look into that.

What I'll do on the next weather break is to take the car out and make sure I don't turn it off, then come back to the house and see if I can get the car to repeat the start problem. I'll make note if the pumps are running and maybe pull a plug or two to see if they are wet.

Thanks for the ideas.
82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 02-01-2010, 05:28 PM
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