Had new iac valve on my 96gt for year and a half was just on interstate and it was running fine shut car off ran into a store came out and started my car and it was idling high and making a loud humming noise from the intake tube I checked a few things and found nothing decided to pulled iac valve and noticed spring on the plunger inside it was gone. Got a new one from ford and it had the spring on it. Old one was from ford too didnt see anything down inside the intake was wonder should I pull the intake or just run it as it is seems to runs fine with new iac valve and no humming noise
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