Ok, just did a head gasket replacement. Everything is now hooked back up. Now when we try to restart the car, we get lights, but nothing from the starter. Also the OBDII code puller can't communicate with the car. Also the security light flashes very fast when you try to start.
The flashing Security light when trying to start it often indicates that the PATS/SecuriLock systems does not recognize the key. If you have another programmed key for the Explorer, try it, by itself, with no other transponder keys nearby.
If you did not change the PCM or the PATS modules out during this process, I would not expect the PCM to need to be reflashed.
Nothing outside of Head Gaskets were changed. I did have to remove the computer module from the body of the vehicle so that I could get to the back bolts on the head, but it is the same one that was in it to begin with.
your computer probly lost every thing due to lose power from battery and now nothing works am guessing here just a ideal I always hook a 9 volt battery to one of the power *** be for unhooking the battey just to power the computer
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