Mitsubishi evo/vr4 idle fluctuating between
Galant VR4 or Evo. which car is it?
have you reset the ecu? disconnect the battery for 5 minutes. make sure you have any radio codes if your radio has a security code lock.
Also could be the idle control stepper. Mitsu gives it some name like ICU but it's a small mottor attached to the throttle that opens and closes valves to let a little more air in and up the rpm.if it's sticky try cleaning the throttle and the valves.
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