911 stopped running, won’t restart
 

‘89 911: Does crank but won’t fire. Let sit a day but then restarted and stopped again.

Hopefully something simple like a DME relay. Might try swapping that out for a start.

Well, not much information to go on but my first thought is a spark issue, a CDI that's failing.

I would start with checking the usual culprits...spark, fuel issues and go from there.

Walts suggestion is a good one...DME relay is an easy place to start

It could be the points on a old 911, or the crank sensors on a 3.2.

Mark, we need to know the year and of your 911 as a minimum to start to make guesses.

Thank you for the quick reply

Its easier to help when you say what youve tried and checked. Is there fuel in the tank?. Can you hear the pump etc etc etc

An engine basically needs fuel, spark, and compression to start.
We know it has compression, so next time it no starts, check for fuel and spark.

It’s an ‘89 3.2
As I say starts but will then shut down and not restart but does if I let it sit awhile. I thought crank sensor and responses saying DME relay are helpful places to check

To check for spark, my favorite method is to connect a timing light. If the timing light flashes, you have spark.

If you have spark but no fire, then apparently you don't have fuel.