I have had the poor and fluctuating idle during cold start up. Car drives fine after everything is all warmed up.
I recently purchased a good condition used ISC valve from a 06' Evo IX ...the units are different and only share the same harness connector and screw holes. I have installed it and the idle is still crap initially.

Didn't know mitsu would change the part that drastically.

Any ideas? List of part#'s for the ISC from 03-06?

- Jeff

 

I can't comment on the 06's but I noticed yesterday the ISCV tables of an 05 rom (specifically the AC off-drive and AC on-neutral) have a much higher values in the colder temps than my 03 rom.

If the idle is crappy on a cold start but gets better maybe adjusting the ISCV parameters could help?

 

adjusting the values doesn't make a difference. The idle used to change...

 

my got FRIED! i have a evo 9 and got one from a evo 8 and it works

 

ur start up was crappy b4? did u reset the battery? or it fixed itself right away?

 

Mine was fried too from alky... I had my battery unhooked when I installed it but I remember it being better right after installing.

 

i thought the 06' unit would work...no change at all.

 

Nikkadanny,

Why did yours get fried? Meth?