Okay, My mechanic discovered the cause of my miss and never ending code 44. My ECM is junk. Now, the good part: I went to GM and bought a new one, put in in and the engine light came on and stayed. I attempted to scan the system with a Snap-on unit- No communication. SO, I went back to GM and they exchanged the ECM (and told me they'd only do it once...). The new one has a strobing SES light, it WILL talk to the scanner, but gets a "Communications Mismatch" error. The data it does give is crazy stupid and the car struggles to idle when being scanned. Any ideas? All of the wiring is right, no shorts. The original ECM was fine except for a fault on the O2 sensor circut. Any help would be appreciated.

 

I am in a REAL piclke guys! The car won't even start, just cranks and fires, im on my 3rd NEW GM ECM. Someones bound to have seen this before, is it a burnt Memcal? A bad PROM? Anybody???

 

3rd ecm? DAMN! Id say you either have another probelm other than the ecm.

Also i've had the 44 forever but other than the check engine light the car runs fine.

Sorry im not much help.

 

put it in was it grounded ? ive seen them when they were just laying in there not grounded to the body they wouldnt do anything but if it was i would look for another chip and if that doesnt do it then start tracing wires

 

At least I think I did. I believe it was either PROM or Memcal failure? Either way, I got a ECM from a junkyard, slapped it in and it works great. It came with its own chips, so I believe mine were just wiped or somthing.