64Scout

This sounds dumb as hell, but three days in a row now. I have an 89 m6. It starts just fine in the morning to go to work, but after work when it's about 95° out it doesnt want to do anything. As in, wont crank over. The dash lights up fine. If I put the windows down and air it out for awhile, it starts normally. I think the heat in the cabin is affecting a switch somewhere, clutch switch maybe or ignition switch? The security light doesnt flash unless the doors are open, so I dont think it's the VATS. Any ideas?

1993C4LT1

If the security light is steady lit with key in the ON position, then yes, it's vats problem.

65Z01

Try taking a good erasure to each side of the "chip" in the key.

64Scout

It doesnt come on. It only flashes when a door is open. Doors closed, its off.

1993C4LT1

My guess would be starter related, since you say it doesn't crank when ambient high temps.

Paul Workman

That was what I was focusing on - having experienced that before...UNTIL he said that after he opens the windows and airs it out - i.e., cools down the interior, it will start normally. That, eliminates (?) the starter, at least for the time being. methinks.

I think I'd refer to the FSM and start probing the start circuit: divide and eliminate! (Oh, intermittent problems are sooooo much more challenging than hard failures!)

64Scout

I thought about a hidden starter button somewhere.