Is the odometer off too?

 

Nope...

 

Monday and probably around 500 miles later... the car is doing this AGAIN!!!

 

Does it surge/buck when the tach bounces? Mine does this from 30-40mph. Tach bounces - car surges/bucks in time with the tach bounce. Like you, dealer cant find anything wrong and basically agreed w/me when I said I guess it has to FAIL before anything can be done.

 

Nope... it just bounces... both the needle speedo & the digital in the performance display speedo.

 

Have they replaced either the ECM or the BCM, or are they just dorking around in general?

 

dorking around... been in there another week.

I guess they worked on some ground wire today... but obviously it didn't fix it, cause they never called me to tell me.

 

At this point I'd start proceedings to pursue a vehicle replacement under the Michigan lemon laws. Here's a link with pertinent info if you need it. Sometimes the threat of a lemon law action will cause a dealer to change their attitude in a hurry.

http://www.carlemon.com/lemon/MI_law.html

 

coughTrustMeIHaveItcough

Update:

The faulty ground wasn't faulty. ECM is being replaced.

I'm starting to hate this car.