Well I just got my car up and going for these few warmer days this winter. It had not been driven for a few months. As I was taking it out for a spin my tach would like flutter after I hit 4,000 rpm under high boost. It would just like slam over to 8,000 rpm for a split second and then it's fine afterwards. Could the cold weather make the grease freeze or something?

 

mmmm..... boost.....

anyways....

check the connections to the tach from the trailing coil and ignitor... all of those things...

 

Mine did that when I needed new plugs. I put new plugs in and it went away.

~T.J.

 

mine did that too, check to see if your coil is dirty, i cleaned it up and now it works fine

Snake Eyes<l><l>