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I had a similar problem with my 07 GT where when the car was up to full temperature and then shutoff, it would not turn over due to a PATS issue. The car essentially behaved like it had the wrong key being used to start it - turnkey and nothing. I had the dealership repro the issue and verify...

Thought I would post an update since replacing my ECU and bring this thread to an end point - problem is FIXED! Pretty simple process to remove and replace the ECU - just a couple of bolts and 3 connectors. I ordered a new set of key blanks with the ECU and had them cut at a local locksmith...

Thought I would post an update for anyone else who experiences a similar problem. I replaced the BAMA 93 Race tune with another BAMA tune that I ran without issue for ~9 years, 89 octane performance tune. I also flushed and replaced coolant. Drove the car yesterday maybe 25 miles, sunny 70...

Thanks Juice. I can return to stock, but think I will just go back to running the performance 89 tune. I ran that tune for several years prior without any issues, so will see if that makes a difference. Yes, I should have thought about it more before posting, but you are right that indicates...

I spent some time inspecting things yesterday and have a few thoughts for feedback: I did a visual inspection of all wiring and connectors in the engine bay. My car is a Cervini build C300 which includes the PIAA lights in the front end. When they installed them, they covered the wire running...

Yes, clear as mud ;-) My understanding with the potential grounding issue is that when this occurs it essentially is breaking the ability for the sensor ring to communicate with the PCM, creating a no start condition. All other electrical aspects of the car function (radio, windows, locks...

Thanks Juice. I came across a video on YouTube of a Ford mechanic who troubleshot the same symptom on a Ford Focus to a bad ground. I am going to check into this as a target, but the problem only occurs when temps are hot. Wondering if when the temps rise, the a poorly grounded circuit...

Giving this a bump in hopes someone has other suggestions before I pull the trigger and replace the ECU.

I think the anti-theft is ECU, but will do some research on the SJB. I also just came across this video done by a Ford mechanic. Granted this is on a newer Focus, the symptoms are the same. I am going to cleanup the ground connection as he suggests and see what happens before spending the $$...

I have a 2007 GT and have experienced the following problem last summer/early fall when the weather was still hot. I drive the car home from work, about a 50 minute drive and the outdoor temps were pretty hot, about 91 degrees. I get home, shut the car off and go in the house. Come out 5 minutes...

My 2007 starting having similar issue last summer, but mine was related to heat. Would start and run fine but after driving home from work (40 miles), if I shut it off, it would not start again until cooled down. After investigating all I could, I brought to Ford and they were able to repro...