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Re: Surging idle
I finally got around to replacing the IACV the other day. $28 from some local auto parts store. Engine now has what appears to be a correct fast idle when cold, settles down after it warms up. I haven't put a calibrated tach on it, but the dash tach says 900 RPM park, 750 RPM in drive. I'm been trying to locate what the idle RPM should be, but that feels approximately right for a V8.
Change out took all of 10 minutes, although I did break the retaining clip that keeps the connector in the IACV. Be very careful, that aged hot plastic gets brittle. To make the matter worse, the clip is facing down (at least on mine, but I imagine that's pretty consistent), and I snapped it as I was feeling around for it. It's not going to fall out without the clip, but I may wrap a small strip of aluminum tape around it to be sure.
--jc
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