I have been having this problem for a while. When I start my GT, i let it warm up for about 2-5 minutes. And when I take it out for a daily drive, it seems like the engine is making a bunch of noise, but the car isn't moving as quick. for example, a morning drive after it has warmed up for about 5 minutes I take it out and when I give it gas, the engine rev's but jerks the car forward and pulls it back. anything will help

 

The ground on your coil pack? Mine has done that before.

 

so you think it the grounds for the coil pack. Is there a name for that? thanks

 

MY 3000gt would jerk going down the road it ended up being the cylinoid in the transmission. Part cost almost 400.00 but it fixed it.

 

ah yes. That happened to me twice, and i had no clue what was going on. But my problem fixed itself somehow someway.
Goodluck

 

Bad plugs or wires.