Tach help

for some strange reason, the last few days, my tach has been bouncing around, not smooth like it use to be. I added msd with a new intake mani and throttle body and had my ecu chipped, and since then the tach bounces around, even at idle, how the msd didnt do damage to my distributor?

That tach jumping is more likely a symptom of some other issues....

Your coil is prolly not connected well, or your igniter is acting up, or has loose connections. My car ran like ass when I first replaced the igniter, and then once I got it "properly" installed, it was :thumbsup:

You may want to go back and double check all your connections and make sure nothing's loose.