M
mldpsu
Guest
Hope someone has an idea. About a month ago I had to replace the ECM in my 1990 coupe with a rebuild from NAPA. Of course I kept the chip from the original unit which was the standard GM installed chip. Shortly after I noticed that the car just didn't feel right. Very slow off the line. Not really hesitation, just no low end power. It won't even spin the tires at full throtel. I have a GTech performance meter so I decided to test it and make sure it was not my imagination. I have a good set of baseline runs from a few months earlier. Prior to the ECM swap my 0-60mph was 5.4 seconds. Now it ranges from 6.4 to 6.8 seconds.
The engine seems to run fine otherwise. I don’t even know where to start. Can anyone help ???
The engine seems to run fine otherwise. I don’t even know where to start. Can anyone help ???