was using a stock ecu then used chipped pr3 ran even better and faster....but now scince the car runs like ass there is no change when interchanging ecus

 

do a compression test and a leak down test. u could b about to blow a head gasket. also check your timing and make sure thats all good.

 

compression is 210 across the board.... no leaks anywhere on the motor...

 

check your timing then. have you had the motor apart at all? cams out?

 

the problem is most likely wiring. the person who wired the fan and
shift light in had to have tapped into something they were not supposed
to or improperly connected some wires. i would have to see it to be
100% sure, but if it was fine before that then the is a wiring issue.

 

Is this still a non obd car or does it have a obd-1 conversion.

 

EF's are real sensative with wiring , so id check to see if any codes are thrown or any loose wires at the ecu