intmdatr3

My ecm is suppose to be a 1987. The ecm number is 7-7165 and when looked in side it has a jet performance chip 18812. The car is not running right and tracking down possible causes. Problems are rough running and uneven idle. My question is when I research this it only works on a 1988 ecm.

aliceempire

iTrader: (14)

1227165 ecm's were used on all tpi engines from 86-89. The prom changed for numerous reasons from engine size to vehicle type. It's not the ecm that's different, it's the calibration in the prom itself for whatever it was intended to run. All proms for that ecm will fit in every year ecm of that same number. But since the calibrations changed you typically don't want to just swap chips without knowing what's changed. Example, don't use an 88 chip in an 89 car since 89's have no cold start injector and the 88's require it.