my tach has been bouncing around independant of engine RPM. no mis-fires or anything. any ideas? ICM maybe?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jweller &raquo;</TD></TR><TR><TD CLASS="quote">my tach has been bouncing around independant of engine RPM. no mis-fires or anything. any ideas? ICM maybe?</TD></TR></TABLE>

You may possibly have a coil acting up. Honda had a bulletin out about this issue on the V6's ... but could also be happening on a 4 cylinder.

 

I've got a MSD coil with ~~maybe~~ 5k on it. no MSD box, just the coil. I thought I was having problems before, so I replaced the stock coil with the MSD.

wouldn't a bad coil cause a misfire? It's not missing at all. usually does it at highway speed, light load, and around 2k - 3k RPMs

 

i had the same problem in my 93 GSR, it did it on the highway first thing when the engine was cold. once the car heated up it was fine, i never found out what it was, sorry can't help ya any.

 

check your connections at the distributor