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· Registered
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I am sure you can backprobe one of the wires to see how much voltage is running through it. Pull it off anyway and see if the plunger is gummed up. It's very easy to see if the IAC is clogged (Which is probably is). If it seems to be in working order, goto the MAF, and make sure your cooling fans and coolant level is good (You mentioned high heat).
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