I have a 92 Buick PA. Sometimes when I turn off the ignition, it fails to start up right away. It takes about 10-30 minutes before she will turn over again. I have read some forum comments similiar to this except when driving. Is the cam sensor the problem or something heating something up to do this?

I have 92 Park Avenue sometimes when I turn off the ignition, it fails to sart
up . Some times takes 15- 30 minutes befor and is turn over again.

Have you seen any codes stored?

You may not have a Check engine light! But have a code.
Very hard to diagnose without more checks.
Could be heat related, could be sensors. Could be flooding.
Lots of stuff.

Good Luck.

When you say turn over this indicates a bad battery,battery cable or starter. A motor that is out of time is a lot harder to start. Check battery voltage and the amps the alternator is putting out. Make sure the ground strap is not loose.