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2005 Ford Escape PCM Relay Overheating
@thecardoc3 , you are the person who knows how to use test equipment. I have been having the same problems as I've read about with my Escape but I know it runs way too good for it to have all these major issues that people are told it has. No plugs or coils burnt up, no PCM fried, no new engine needed. None of the multitude of expensive repairs people are getting that don't solve the problem. My Escape runs like a champ. I'd drive it across the country. As long as the OUTSIDE temp. is less than 75 deg. For OVER 2 YEARS I've been trying to determine the real reason for the sudden quitting and the other symptoms that go along with it. I drive it 60 miles when it's 75-80+ degrees outside and it quits. Over and over.....It's taken 5 hours for me to drive 40 miles. (more than once!) In June it went 150 miles before it quit while towing a small pop-up camper. I had to leave the camper, drive home and get the F150, that gets 17 mpg. Last year, determined not to give up it took 16 hours to make a 9 hour drive, again, towing the camper. Yesterday, 70 something miles from home, on the side of the Interstate and 95 degrees outside it quit and I decided to experiment. I had my lunch with me, a freeze pack in my bag so... It feels like I run out of gas so I felt all my relays and they were ALL hot as a pistol but the fuel pump relay felt the hottest so I swapped out that relay with a spare I had with me and away I went. Are you kidding!? OK, I went about 10 miles and quit. I felt the relays, the PCM relay felt the hottest so I swapped it out for another relay I had with me. (I have narrowed it down to an ambient temperature, overheating of something electrical, relay, sensor, SOMETHING electrical related, so I had extra relays.) Now I start up and away I go! Let me interject here, I have the high speed fan relay jumpered so that it is on all the time. And the cat. has been removed, and I do not use the AC, or the cruise. Another 15 miles and it quits and I swap out the PCM relay again and I decide to lay my freeze pack on top of the relays to keep them cool. I managed with some electrical tape and drove away. NO problems. It quit after about 20 miles. I felt the relays and they were all nice and cool EXCEPT the PCM relay. It was hot hot. I swapped it out for a cool one and drove away. No problems. OMG! It quit after about 15 miles. I checked the relays, all nice and cool except the PCM, it was hot as hell. I swapped it for a cool one and drove away and this was the pattern all the way home, 15 to 20 miles and quit, swap, and drive. I went the back way so I didn't have to drive as fast and there were safer places to pull off. It'll coast pretty far in neutral. I can drive the 20 miles to work in the heat at 55-65 mph and go through the 5 lights in town without quitting but I cannot rely on it to go any distance. I can't wait for the cool days of Fall to get here so I will have no concerns about getting killed on the highways. I'm going to invent a way to keep that PCM relay cool while hopefully, Cardoc3, YOU can figure out why the PCM relay is overheating. I will leave it to you.