My mechanic is having a hard time figuring out why my 89 z 2.8lt is running with a high idle. Last thing done was to replace the ECM (used) and using my original chip. The car runs ok but it now has hard shifts up to 60 kph. It hangs on to second gear up to 60 kph then bangs into 3rd. Them if you start to push the accelerator in bangs down a gear.The faster you go the less this happens.
Any ideas????
Cavyguy08
