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Old 10-21-2012, 11:17 PM   #4
Scooby Specialist
Member#: 236927
Join Date: Jan 2010
Chapter/Region: NESIC
Location: Oakville CT
2015 BRZ 93 LEGacy33
1984 BRAT


The picture you posted above is an early IACV, which should be similar your IACV. They mounted them in all different places on the intake manifold on the early models.

The newer ones are integrated onto the top of the throttle body, whereas the early IACVs were mounted directly to the intake manifold.

There should be 4 10mm bolts, a coolant feed and outlet, and some sort of hose that supplies it air when the throttle is closed.

Definitely not an extremely difficult task to take it off and inspect. These tend to gum up which makes it difficult for the valve to function properly at times, especially as it becomes colder.

Take it off and inspect it. If the IACV is your problem, then good. If not, my next thought would be your coolant temp sensor is at fault which could also explain a rough start/idle.
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