No I don't have access to a Scangauge, but thats a good suggestion. The car idles fine and maintains a normal operating temperature though.Do you think it could be the MAF, telling the ECU that there isn't enough airflow?

It is fully warmed up, and the lift bolts were replaced after the problem started occuring. The dealer has washed their hands saying that it is "within spec".

My 04 GT has 30,000 kms on it. The car won't rev past 6500 rpm, so vvtl wont kick in. It hits a fuel cut off almost as if I am hitting redline. It used to work just fine but all of the sudden it won't. Car is under warranty but three dealers gave me the runaround and GM service is useless.Anybody ha...