drpz28

My 95 z28 has new brand spanking new optispark,wires, plugs and coil.Ican drive it all night long when the outside temp is 70 or lower and it runs like a champ but when i drive during the day at 90 degrees and up it starts missing bad, and the rpm's at idle go up and down from about 700to 1500. The temp gauge dosent get over 180 degrees. Whats up with that?

imnotplutonium

iTrader: (4)

maybe your coil is overheating?

drpz28

I thought about that but how would i correct that problem

harvickgm

iTrader: (10)

or the ICM is over heating and causing that problem...

slamm69

iTrader: (1)

Mine did almost the same thing and it was the ICM.If you have a bud with an LT-1 just switch them out to test it,if not I dont think any auto parts store can test them.So takeing it to the dealer to test would cost almost as much as a new one.

slamm69

iTrader: (1)

Proven fact-The ICM and heat get along about as good as Lebbanon and Isreal.Hope the spelling is close......

drpz28

forgive me for being stupid but what is the icm and where is it

slamm69

iTrader: (1)

Ignition Control Module,its located on the same bracket that the coil is on.

drpz28

thanks for the info. I am gonna get one monday

infinitebird

iTrader: (11)

also try the icm cooling mod to space it away from the head. That has helped some.