So after my car wouldn't start after stalling last night(see my post in off topic) it has done the same thing twice today.. it always starts up after sitting for about an hour...

Could the fact that the car runs rich have anything to do with this? Could it be running so rich that it's getting more gas than it can burn, thus flooding the engine?

 

Which car?

 

The 951.. I've been driving it for 3 days, and it's left me stranded 3 times.

 

Is it after you drive it around and stop it. Then try to restart?

 

Yeah... here's the story:

Was driving around, put $40 of mobil 93 octane, drove around for about an hour+. Stopped the car, came back to it about 20-30 minutes later, it started up fine, I turned around, started to go... got about 10 feet and it died. Felt like I stalled it.. it didn't start back up. I came back to it about an hour later, and it started up(after taking the gas cap off, but that was a coincidence)

Woke up this morning, dropped my friend home, the car died in his driveway... but started right back up.

Drove to my friend's house right away, stopped the car, went in for about 20 minutes, came out.. didn't start.

Sat for an hour, started up again. Drove 10 miles down the road to check out a van for my friend, and the car died in the driveway. Did not start back up. Pushed it up a hill, across a street, through the grass, and into a parking lot. Car sat for about 4 hours. Started immediatly after.

Car apparently blew black and blue smoke under hard acceleration(According to my friend who was following me on the way home)

I'm not confident driving the car anymore, because I don't want to get stuck again..

 

Welcome to 951 ownership. When you say it doesn't start, be more specific. Does it crank? A friend of mine had a similar hot start problem and a new starter and the addition of a missing heat shield solved the problem.

Lol, the n/a still for sale?

 

I had a friend who was having the same problem, and it turned out to be the coil. When the coil would get hot enough, it wouldn't spark hot enough. After it sat for a bit, it would cool down and fire right up. Did you check to make sure you have spark when this happens?

 

I'd say bad FPR. what do you think?

 

fPR = fuel pressure regulator

 

Have spark and fuel.. it definitely cranks(the car will move if you start it in gear) it just will not start. Sometimes you can kind of hear an exhaust puff when you first try starting it...

 

Don't do that! hehe

Also, did you get my pm?

 

Yes, replying...

 

This sounds exactly like my problem:

Symptoms of a failing DME relay may appear in several ways. Early on, the car may not start or be difficult to start when the engine has been shut down and restart is attempted while the engine is still warm (actually while the DME relay is still warm). When this happens, the car will normally restart when it is allowed to sit and cool for a period of time (usually from 30 minutes up to 2 hours). Another possible failure mode is for the car to suddenly die while driving down the road. Again, the car will often restart after it is allowed to cool.

Going to try this...

 

I second a bad FPR.

 

My car just started doing the exact same thing! It's really bothersome.

In my case I've got to let it sit for a good 2 hours or more before it'll start up again though. I've got a spare DME relay and swapping that out doesn't change anything and I put a new FPR in there about a month or two ago. I also pulled out the fuse box and cleaned up all the connectors in it thinking it was electrical.

My current though is fuel pump since it sometimes starts up for half a second then stalls out, as if it burns off all the fuel in the rail and doesn't get anymore. Of course there could still be some bad contacts in the fuse box as I only cleaned up the contacts going to the plugs on the bottom and not the actual fuse/relay contacts.

If you figure out what it is please let me know. I'll do the same