[carolinatrophy]

I hope someone can help me diagnose an occasional no-start problem with my 1986 944 Turbo. The symptoms are almost exactly like a failing DME relay, but I have changed the DME relay several times and the problem persists. The details are as follows:

1) Whenever the car has been sitting for any appreciable length of time (enough to substantially cool down) it starts perfectly. No problems.

2) 95% of the time, even when it's hot, it starts perfectly.

3) VERY OCCASIONALLY when it's hot, it will fail to start. Cranks perfectly, all the electricals seem to work fine, but it just won't start. Just like a bad DME relay, but again, that's not the problem.

4) Generally, I can just wait five minutes or so and try again and the car will start. A few times, I have just sat there cranking it for five or ten seconds at a time, and after a few minutes of doing this, it eventually caught and fired. But sometimes it takes a bit longer.

5) If it's not starting and I sit there cranking it anyway, when it eventually starts it starts perfectly. It doesn't cough or sputter or anything. One minute it won't catch and then the next minute it does.

Again, if the car has been sitting and is cold, it ALWAYS starts right up. ALWAYS.

Any ideas of what I should check?

Thanks in advance,