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The IAC valve has two openings on the back of it. Spray throttle body cleaner or

brake cleaner spray into the holes and clean with q tips. There is a spring in

the middle interior of the IAC valve. It loosens up a little after being sprayed

and rubbed with q tips. You can access this area without opening the IAC valve.

We tried to open the IAC and had no luck. The screw in the bottom center of

the IAC is plastic and a torq bit tool is probably required.

We bought a used IAC off eBay for $70. It cleared our P1506 code : Idle air control overspeed error. But that code is back and I'm thinking it's the Front Left oxygen sensor since that sensor controls the fuel injectors and we have a lean isssue that I

am judging to be the cause for the RPM overspeed.

Just bought a new original equipment Denso oxygen sensor from www.densoproducts.com

One thing worth mentioning is we have a 1999 Mazda 626 V6 manual transmission

and I bought a throttle body with throttle position sensor and a IAC valve for a

2000 Mazda Millenia and they are interchangeable parts.

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Q: Cleanig of a IAC on a 2000 Mazda 626?
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