Paranoia - Engine shudder?

[maor]

First thing to point out is I do have a tiptronic transmission.

There are 2 odd things, coming from an LS430 I may just be paranoid.

1. On idle in D the rev needle bounces slightly, as in it vibrates if you look close enough, almost hunting like, maybe + - 50/150 rpm? It's certainly visibile that it is moving up and down.

2. In gear driving along, lets say around 30 MPH at around 2000/2500 revs, if you very gently accelerate I feel some sort of surge/jerky/hesitation type thing going on with the engine. You've gotta be looking out for it pretty **** close to notice this.

It feels like the engine and not the transmission.

I've cleaned the MAF and TB and it didn't make an ounce of difference.

Am I being super paranoid here?

[txhokie4life]

What year car?

Could be idle control valve?

variocam kicks in about 3K rpm.

Mike

[maor]

Sorry 2004 3.6 everything standard.

[Loren]

MAF will make no difference at idle (unless it is completely out).

When you cleaned the throttle body did you clean behind the butterfly?

Did you remove and clean the throttle valve position sensor?

[maor]

Yes I did.

TVPS? Not a clue where that would need cleaning? Is it the electrical connection on the TB?

[Loren]

Yes, the TVPS is on the the throttle body and has an electrical connection.

Remove and clean the electrical connection with suitable electrical contact cleaner.