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Aeroforce pt401 scan gauge on my 1998 trans am

This is a discussion on Aeroforce pt401 scan gauge on my 1998 trans am within the Computer & Tuning forums, part of the LSx Technical Help Section category; I recently purchased a brand new PT-401 scan gauge from Maryland speed. For some reason when I go to IAC ...

  1. #1
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    1998 Trans Am WS6

    Aeroforce pt401 scan gauge on my 1998 trans am

    I recently purchased a brand new PT-401 scan gauge from Maryland speed. For some reason when I go to IAC counts it displays 0 no matter if the car is at idle or revved up. Has anyone else had a issue like this. Pisses me off I have e mailed them and posted on their forum with NO help offered. Not even a week old

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Maybe you have a vacuum leak.
    If it still idles with the IAC closed (@ 0 counts), that indicates a vacuum leak.

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    Wouldnt I have other issues (poor idle) running like crap etc if there was a vacuum leak. Plus I would figure there would be some sort of fluctuating when I hit the gas whether it went up then back down something indicating it is reading! It stays dead on 0 no matter on or off revving or idle!

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I had a PCV vacuum leak. Only real symptom I had was a slightly high idle (almost unnoticable 100 higher). My IAC counts were at zero. But I think you're right, it probablly would bump up a little bit while your driving around for the Throttle Cracker function.

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