Car won't start after washing...

[theman1990]

Interesting thing I've noticed, the car won't start after washing unless I get in, crank it then turn off the ignition and open/close door. Fires right up after that. Even with a very gentle door close (so not to shake a loose connection) it still does this. Every time I wash it. Security issue?

 

[Chuck Leeper]

Yes, it's a "factory experimental" security system.
Only 1 of 1 ever made.
Your car was obviously a corporate employee's car, as that's how systems were tested.
A prelim check for H2O in the ecm is a start. The H2O is deposited thru the seam at the a/c box to firewall seal. That was another preproduction test for seal integrity.

 

[theman1990]

More that I see the "security" light flashing, wasn't sure if it was a horn or ignition kill or what. Have already looked for leaks, all dry. Not using high pressure, under-hood relays appear dry, too. Have only ever noticed that it happens only after washing/drying, not with rainstorms. I know my McLaren has a LOT of electronic "quirks" due to #britishelectronics ... Didn't know if Buicks in the 80's were similarly afflicted.

 

[salvageV6]

If you can crank it, meaning the starter cranks the motor over, then it isn't the factory security system.