Sep 9, 2009 at 1:00 AM
It's been a year and a half now since i got my Grand Marquis '90. It finally came to the point where i had to overhaul the engine due to excessive blow-by.
Problem is this. The shop who did the job, also, somehow, burned the PCM. They did not disconnect the battery. They replaced the PCM (supposedly) from a surplus store here (again, supposedly form the same car year-model).
Symptom now is this. Will start on third crank. will idle, but will die down after a few minutes. But will run if I give it more gas. When running, it will die down when changing from 2nd to 3rd gear.
So i bought a code reader and Chilton repair book covering my model from states-side. Got it in three days. Code reader said MAP sensor (22-O).
Bought a new one (DY527), but same result. Code reader said same problem. Checked old one, found still ok as per Chilton. So got hold of a ford mechanic here and just took out the MAP sensor connector. Am able to use the car. High idling though, still can't use the A/C as it will die down.
Longer story short,...Chilton said that PCM shoud be re-programmed when replaced.
Does symptoms point to the PCM? Can a 1990 PCM be re-programmed?, and WHERE?
HELP PLEASE.
Thanks
Problem is this. The shop who did the job, also, somehow, burned the PCM. They did not disconnect the battery. They replaced the PCM (supposedly) from a surplus store here (again, supposedly form the same car year-model).
Symptom now is this. Will start on third crank. will idle, but will die down after a few minutes. But will run if I give it more gas. When running, it will die down when changing from 2nd to 3rd gear.
So i bought a code reader and Chilton repair book covering my model from states-side. Got it in three days. Code reader said MAP sensor (22-O).
Bought a new one (DY527), but same result. Code reader said same problem. Checked old one, found still ok as per Chilton. So got hold of a ford mechanic here and just took out the MAP sensor connector. Am able to use the car. High idling though, still can't use the A/C as it will die down.
Longer story short,...Chilton said that PCM shoud be re-programmed when replaced.
Does symptoms point to the PCM? Can a 1990 PCM be re-programmed?, and WHERE?
HELP PLEASE.
Thanks