ECM 1227783 1987 LG3 Pontiac Bonneville

**beretta3400** · 06-15-2014

Hi guys, I need a little help. This is my first post here, so bear with me. My '87 Bonneville had a toasted 440T4 trans. I swapped in a 4t65-e and I'm running the diesel TCM standalone for that. All of the old transmissions diagnostics go through the current 1227783 PCM and I want to prevent any check engine lights from cropping up, this will be my wife's car and I don't want her worried. So, I want to tell the PCM that it is now in a manual shifted car, I want to enable highway mode and I want to turn off some of the diagnostics.

I could normally do all of that. But I found out that there is very little support for this PCM... like nothing, I have been searching for hours. So I guess I'm looking for an XDF file for a $44 mask AKBA code PROM. or help in making my own XDF file.

**beretta3400** · 06-16-2014

Must be there is no support for the 1227783 except ALDL files. bummer.

**EagleMark** · 06-16-2014

I've never heard of one? Have to remember that was the early days of DIY development and that was not a car that many people had an interest in hot rodding...

Wonder if there is a compatible ECM?PCM that could be re-pinned to your harness?

Or have you checked TunerCat? He has a lot of files not commonly used.

**beretta3400** · 06-17-2014

I think TunerCat may be the only person on the internet who has that definition file... I plugged the Bin into Tunercat's software and it requested $44 code be used. This is consistent with all the cross reference info I was able to find. He does have the file, but He wants $199 for the file... I only paid $350 for the car due to the bad transmission. I was hoping a 4kb definition file wouldn't cost more than half of the car's value.

**EagleMark** · 06-17-2014

OBDI definition files are only $19.95. Not sure how you got $199?

**beretta3400** · 06-17-2014

I just tried it again, the product description is different than before; you are right, $19.95 is the price... Hmm... strange. I'll check the history on my laptop when I get home to see just what was happening there. Thanks, Eaglemark, for your help!