Hello , new here , a guy dropped me off this horizon with a 2.2 (or 2.5) turbo frankenstein of a swap. It has the small turbo , a 87 shelby z intake , a one connector pcm. And its kinda a mess...Ive worked on it on the flooring and now it has issues...

You know like when you do the brakes for someone and now the AC Doesnt blow cold anymore kinda sht.

Now I got this in codes after a battery reset. : 12-51-14-24-53-55.

Ive replaced the tps for a caravan 88 3.0 and nothing...im thinking the pcm might be shot.....

Idles a little high but as soon as I give gaz , it falls flat on its face.....I have 5v in the center pin. Of the tps and 0.1v on the other 2 pins even if I open up the throttle....

Please , any input would be appreciated I donno these cars a whole lot.