Hi all. I am looking for some help before I head out to the dealer. The problem I am experiencing only occurs on a hot day.
I would get in the car for the first time in the day and it would start right up with no problem. If I park the car after driving and walk into a store, the car will not start when I get back. Occasionally, I would wait about 30 minutes and it would eventually start.

I recently replaced the battery and alternator in an attempt to solve this problem with no luck. I was told it could be a safety switch which I replaced and still no luck. I would like to keep the car because it only has 38K miles on it, but last Friday it left me stranded for 4 hours and it would not start in 95 degrees outside. I finally had a friend pick me up, and I went back for the car on Saturday morning where it started right up with no problem.

My nearest dealer doesn't have an appointment available for another two weeks.

Try a crankshaft sensor, those symptoms are classic. Could be a cam sensor also, but more likely the crank.

Thanks, wouldn’t the sensor give a code. There are no codes on the scanner. I have the autel im508 scanner.

original4u wrote: ↑

Wed Jul 21, 2021 4:18 am

Thanks, wouldn’t the sensor give a code. There are no codes on the scanner. I have the autel im508 scanner.

No, very often they miss teeth at cranking speed but don't "flatline", and the ECM simply gets confused and doesn't know when to fire the plugs. Once the engine does fire, the increased reluctor speed cleans up the signal. So no code ever occurs.

Thanks for the info. I will try it. Just an FYI, it doesn’t crank when the issue presents itself. I would press the brake pedal and push start with no feedback. All I hear is the fuel pump and nothing else. No starter or crank turn over.

Oooooh, that's different. Try a brake pedal switch.