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97 Intrepid Sport 3.5 L

I have been dealing with a stalling issue that has led me to believe that i have a vacuum leak. I want to try the IAC first but would like some more info first. I pulled it out and cleaned it with carb cleaner as it was pretty filthy. My question is, should the "plunger" thing stay put, or should this move fairly easily. basically what steps do i take to see if it is bad....
 

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The plunger don't move easy. When you clean it don't move the plunger because you can break it. If you want to see if is your IAC work took you thumb and block the IAC inlet and watch what it will happen. Many time when you have intake leak the engine rpm rise.
 

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The IAC is almost always filthy. Even after you clean it, it will get dirty pretty quickly. The plunger doesn't move easily and, like mine, can get jammed after cleaning.

I replaced mine with a NAPA one. It was somewhere around $60 or so and made a world of difference in stabilizing my idle.
 
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