i have a boosted galant with a 4g64. since boosting this car i can not get cold idle to work right like it was before boost.

i changed iacs and nothing changed. im running an evo iac which is in reality the same as the galant iac and nothing, the car starts cold and idles like its fully warmed up.

its driving me nuts. any ideas on what i should check ? iac signal ? or anything that help me pinpoint the issue.

i was originally running the stock H* ecu tuned and it had the same issue, now im running an 03 evo ecu with Tephra v7 and same results.

when logging my ISC steps are at 10 and idle is at 850 after playing around with the BISS.

my tuner who remote tunes for me told me that it should be at 30.

tried to use the actuator with evoscan and i dont think the actuator works for me since it activates and does not affect the idle when activated.


any pointers or suggestions are appreciated it. i really want to fix this issue and just dont know where to look.