Awesome work bzchi.. Looks like thats the issue..
That code wasnt in my copy of Autodata.. and I wasn't reading the code properly so that didn't help either..
Now its all making sense. I have disconnected the battery to clear the codes ( its back to flashing 12 again )
Hopefully tomorrow is another hot day so I can confirm that is the problem..
Its crazy, the car starts misfiring in the same part of the road everytime. About 70k's from home
