Hey guys, I've been posting this on multiple forums seeing if anyone could point me in a direction for the strange problem my car is having. It seems the shop I'm at is even having trouble.
Basically what's going on with my car is it starts up fine, drives around fine until the engine starts warming up. Once the engine warms up, the car basically tells me to enjoy being stranded somewhere. If the car is in neutral(It's a 5 speed) and i'm just sitting somewhere idling, the car will at random start revving itself like someone is playing with the throttle or as if someone was trying to record an exhaust video to show off. I took a video of it. My legs are nowhere near the pedal, this is just what is does.
It will also do this in gear sometimes, which can be kind of scary. Normally when it revs like that, it only does it for a short while, and it stalls itself like someone turned off the key. Also it never revs any higher than it does in that video. I've never seen it go to 2500 rpms by itself. You know when it's going to stall because the check engine light starts to flash, and then it just dies. It didn't die in that video, i ended up turning it off because it was late at night and didn't feel like getting noise complaints from my neighbors.
Once it stalls the theft light comes on and flashes repeatedly. The car cranks but wont start. If you scan it, it comes up with codes U1147, B1681, and P1260 which all have to do with the PATS system. There is no aftermarket alarm on this car. The code the theft light flahes out is 1-6 "Faulty link between PATS and EECV. I tried it with both keys and the same thing happens. If I let it sit for a little while the theft system will turn off and let me restart the car. This video is of the car after it stalls. There's a clicking sound coming from the CCRM. The fan also turns itself on after it stalls.
Brought it to a shop, and they had an electrical guy come in and check the wiring. They couldn't find a problem there, but reinforced the grounds anyway. They also replaced the crank sensor, but that didn't fix the problem. They also had that guy from Auto Tech On Wheels come check it out today, but just like with the electrical guy, the car would not act up when they were there. It's a totally random thing. He seems to think it's a PCM issue. What do you guys think? I'm at a total loss at the moment.
Also as extra information, I've cleaned the MAF and the IAC, replaced the plugs in July, and put all new ford racing wires on about 2 months ago. Car ran great up until last month when all of this randomly happened. I tried testing the MAF and IAC by unplugging one at a time while the car is running, and the car runs worse(as i think it should) with the MAF unplugged and stalls within a few seconds with the IAC unplugged.
TL;DR
Car warms up and revs itself, stalls, theft light flashes, cranks and doesn't start, eventually starts back up, and everything happens again.
Basically what's going on with my car is it starts up fine, drives around fine until the engine starts warming up. Once the engine warms up, the car basically tells me to enjoy being stranded somewhere. If the car is in neutral(It's a 5 speed) and i'm just sitting somewhere idling, the car will at random start revving itself like someone is playing with the throttle or as if someone was trying to record an exhaust video to show off. I took a video of it. My legs are nowhere near the pedal, this is just what is does.
It will also do this in gear sometimes, which can be kind of scary. Normally when it revs like that, it only does it for a short while, and it stalls itself like someone turned off the key. Also it never revs any higher than it does in that video. I've never seen it go to 2500 rpms by itself. You know when it's going to stall because the check engine light starts to flash, and then it just dies. It didn't die in that video, i ended up turning it off because it was late at night and didn't feel like getting noise complaints from my neighbors.
Once it stalls the theft light comes on and flashes repeatedly. The car cranks but wont start. If you scan it, it comes up with codes U1147, B1681, and P1260 which all have to do with the PATS system. There is no aftermarket alarm on this car. The code the theft light flahes out is 1-6 "Faulty link between PATS and EECV. I tried it with both keys and the same thing happens. If I let it sit for a little while the theft system will turn off and let me restart the car. This video is of the car after it stalls. There's a clicking sound coming from the CCRM. The fan also turns itself on after it stalls.
Brought it to a shop, and they had an electrical guy come in and check the wiring. They couldn't find a problem there, but reinforced the grounds anyway. They also replaced the crank sensor, but that didn't fix the problem. They also had that guy from Auto Tech On Wheels come check it out today, but just like with the electrical guy, the car would not act up when they were there. It's a totally random thing. He seems to think it's a PCM issue. What do you guys think? I'm at a total loss at the moment.
Also as extra information, I've cleaned the MAF and the IAC, replaced the plugs in July, and put all new ford racing wires on about 2 months ago. Car ran great up until last month when all of this randomly happened. I tried testing the MAF and IAC by unplugging one at a time while the car is running, and the car runs worse(as i think it should) with the MAF unplugged and stalls within a few seconds with the IAC unplugged.
TL;DR
Car warms up and revs itself, stalls, theft light flashes, cranks and doesn't start, eventually starts back up, and everything happens again.
