'749 dim check engine light

[4153dodges]

I would, but I don't have another laying around

[Scrufdog]

I would say bad ecm. Around those years gm used a cheap clear coat on the circuit boards that would get micro cracks in it and separate traces and solder joints.

[4153dodges]

That would make sense, the clear coat is flaking apart, plus I can sometimes get It to work by pushing on the chip carrier. Can it be cleaned and reflowed? I dont have a good source for amother ecm right this moment...

[EagleMark]

Didn't look to hard in Buy and Sell section?

[4153dodges]

Honestly I didn't even realize we had one! Lets see if I can afford an ecm then!

[billygraves]

I have a GM Reman ECM for the 2.0L Turbo Sunbird if you are interested. It has the updated part number to fix problems they had. I bought this ECM for a project car I had and ended up selling it. I have the ECM with a MEM-CAL if you are interested. Make me an offer. It's in the buy and sell. I never even used it. Cheaper with shipping than gmpartsdirect.com where I bought it. Aftermarket ECM's I've seen have a host of problems after a short period.

[4153dodges]

Thanks for the offer billy, but we found the problem. After soaking the whole board in a solution to take off the conformal coating, we found about 6 broken solder joints on one chip! A little re-soldering had it back up and running great, even talks to the ALDL cable now! Thanks for all the help guys,
Josh