Motor won’t stay running

Good thought. And good question.



OP says it will run for 30 seconds but maybe that's with the key in start?
He said it runs for a few seconds and dies. Total run time is 30 seconds.

The coil is not overheating in a few seconds, it will run quite a while with 12 volts to it.


Now then I'm going with a vacuum leak. Look over the intake runners and make sure all vacuum ports are plugged.