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Tag: IAC

Idle Air Control Valve (IAC) Cleaning DIY

Step 1: Remove the throttle cover. This requires a T25 screwdriver to loosen the screw on top. When you remove it, the IAC is visible underneath.

Post categories In Engine Breathing - MAF, PCV, EGR, Etc., Volvo 850

Volvo 850 (very) high idle at startup, then up and down

Experiencing high idle at startup? Idle Air Control Causes Poor Idle It appears we have a winner. Took out the IAC, sprayed it liberally with carb cleaner (didn’t…

Post categories In Cars 101, Engine Breathing - MAF, PCV, EGR, Etc.