hey havent posted much but I have 2 p28 ecus here and they are running like crap.
is there anyone that would be kind enough to give me some pointers. I mean, like help me out with troubleshooting these ecus? I'd hate to have to use them for target practice seeing how they are getting rare (in las vegas, at least).

questions.

if they are converted to be chipped, will some of the problems be erased from being chipped?

one when hooked up, will bog around 3500 rpms, and when replaced with a stock ecu, runs just fine.

another, throws a cel that stays on all the time, and has a bad 'timing' or misfire throughout the rpm range.

any help would be great, and constructive criticism is ok I guess.

thanks