Question about 1995 Volvo 850

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How do i i know if my iac is bad? - 1995 Volvo 850

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If the IAC motor is defective, it will set a code on the vehicles computer system. You should have it scanned for codes by a repair facility that has the proper software. Symptoms of a defective IAC can be, hard starts, warm or cold, errattic idle, poor performance, hesitation.

Posted on Nov 18, 2009

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A bad IAC unit will cause poor driveablility and poor/high idle, and also stalling and starting issues. There is really no harm by being bad but during rapid deceleration if the IAC does not catch the RPM's the engine could stall out; not a good thing if you were going 60 mph. Remove the IAC motor and clean the valve and also the chamber that it goes into with a good throttle body cleaner and that should really help. Carbon buildup is a big factor in IAC failure. Most CEL will not show a malfunction code with a bad IAC motor.

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