All,

Car runs great when cold or warm but when I get it on the track and the engine starts to heat up...say 210 or so (digital gauge) it will start to lose power especially in the upper RPM's. After a while, it will just constantly misfire no matter the RPM and won't cool down. Eventually at 225F or so it's very bad.

A mechanic told me that misfiring engines tend to heat up and this is the case here with no cooling down when I let off for a few laps.

I have a blaster coil and no idea how old. ICM and opti have been replace with same issue. Went and bought a new stock coil and plan to replace the Blaster.

Assume the coil since I did not space the ICM and coil away from the head? Why did I not space it? Don't ask me such idiot questions when I did that on my last engine. Just forgot to do it on this one.

 

If it works fine when its cool, just try to space it away from the head... try this...

http://shbox.com/1/4th_gen_tech2.html#ICM_cooling

Courtesy of Shoebox