fiav Options

[Patterson353]

Tell me what you know about them. Pros and cons of blocking off. Thanks

[dualdj1]

Computer controlled vehicles rely on idle air control to set idle RPM. You're throttle valve adjustment screw sets Base RPM, which is significantly less than idle rpm - generally (I have the ford procedures, but not sure on Mitsu - if you haven't touched the idle screw, leave it as is). Your computer uses the IAC/FIAV to change your vehicles current RPM to what it has set as desired idle RPM. Once you start opening the throttle it's unused.

Unless you're going with a DSM link, I'd recommend against blocking off, as your comp expects it to be there, and if it's not functioning will probably go into a failsafe mode of some sort. Even with a DSM Link, personally I'd still keep it, as you can tune it's behavior at that point.

Honestly I can't think of any Pros right off of blocking/removing it, other than it being one less electronic part that can fail. Likelihood of failure is low (might need cleaned at most).