i'm still having the same problem with the car when i first start the car the car ticks over nicely, touch the accelerator and hold the rev's then the rev's drop then pick up then drop again and keeps doing this.and when traveling at speed u can feel it not much but it makes the car judder when changing gear u can see the rev counter drop then pick up again once u have dipped the accelerator again.i'v done every thing that the posts have said above + plugs,leads,fuel filter,oil change dose any one eles have any more suggestions.something eles to add is when u have been for a drive and come back and restart the car it runs fine untill your on the road it's like the car is runing on kangaroo juice