For awhile I have noticed my tachometer wasNt making very smooth or fluid movements. The car doesn't really feel jerky nor does the engine necessarily sound jerky. This is the only max I have driven until today. The max I drove today has a much smoother tach. I have the ses light on but it's for a cold 02 sensor. I took a video to demonstrate. Does anyone know what could be causing this? Also my max still had more get up and power than the stock 02 gle had. I'll upload anther video later to show how the tach looks when it's starting because it may give a better visual to some

Here's the vid

http://www.youtube.com/watch?v=FOWfBunOD5k

 

http://www.youtube.com/watch?v=FOWfBunOD5k

Copy and Pasting links suck.

 

 

What is it like at idle?

 

Doesn't mater, that thing has a mind of it's own.

Either it's loose ... or, no has to be loose because if the actual signal was erratic like that, it would mean crank signal or coils were misbehaving, and that's not the case since it's smooth and no associated codes.