Here is the cheap diagnostic next time the no-start occurs A three second blast of starting fluid (ether, or di-ethyl ether, same thing) into the snorkel, followed by cranking, will tell you if you have a cold induced fuel delivery problem. If it suddenly breathes fire on ether, then your fuel is no...

If it is...please..can you provide info on how to test and rule out a bad position sensor, bad wiring to and from the position sensors, bad ground of the position sensors, etc. Take Abscate's advice and use starter fluid. If the car starts for a few seconds and dies, you know the position sensors a...

After reading this thread I ordered a rebuilt Bosch replacement starter and installed. It's been about a week and I've had no problems starting in cold weather. The starter I removed was NOT a Bosch. It was 21F (-6C) this morning and she started right up! Fingers crossed the issue is resolved. Thank...