MAP Sensor replacement not solving engine issue

[wstefan20]

UPDATE: I am still trying in my spare time to work on this GTP. 

In the past week, I have had no trouble getting it started on a cold engine. Now, that has changed again, I tried to start it to move it into the garage and it would not start after 8 attempts. It cranked, but would not start, a few times it almost started. A few hours later, I tried starting it again and it started right up.

 

I had stopped at a shop few days ago about 5 miles away and talked with a mechanic who is recommended by some other local people I know. I explained to him what has been happening with the GTP. I told him I wanted to install the exhaust with the low mileage catalytic converter, and replace the rear valve cover gasket, and some other items. 

I told him that I may be able to find what is causing the car to not start, and he said if I can't to call and make appointment and leave the car. He said he would check the fuel pressure gauge, and hook up a scan tool to check for codes, and he would check wires with a ohmmeter, he has done that before.

 

Anyways, last night, when I googled "3800 engine cranks but no start", one owner said he had a problem with the ICM (Ignition Control Module). He removed it and the underside was severely corroded. I had never had the coils or ICM removed from this car (actually never removed it from any GP I have owned) 

When I did take off the ICM, it was severely corroded, both the module and the back plate. I removed the corrosion by had with various grades of sandpaper until the surface was shiny.

 

After putting on a coat of dielectric grease, and carefully putting everything back together, I turned the key to start and without hesitation, the engine started up.

 

I did not replace the ICM, I have other ones in the garage, but now I am not going to replace the one in the car.

I want to take it for a long drive and see if the boost gauge shows the level of boost as it was before.

 

I will report back again soon. 

Well that's just another case where corrosion is a pain in my rear! I should have thought of that though. Some other strange electrical stuff was going on with another member awhile back and it ended up being corroded PCM connector.

 

And personally, I just had a fight with the ABS module and it being corroded. Course, that was so bad, I ended up having to replace some of the terminal pins! (not very fun)

 

Hopefully that was it, and it runs like a champ now!