does / could a bad IAT cause misfires ... - FirebirdV6.com/CamaroV6.com Message Board

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  • does / could a bad IAT cause misfires ...

    my IAT i have found out in very cold (below freezing) weather reads -38. does it make the car run leaner or richer. can this foul up the plugs. I am going to replace the IAT sensor today and hopefully that will solve that issue. I am not sure if i should replace all plugs, wires and coils too while i am at it. i have 85k miles and so far i have only replaced one coil pack, and plugs about 40k ago.
    Ummad!<br />2k pewter maro M5. 160 thermo, WhisperLid w/K&N Filter, Jet PCM Stage 2, Free Ram Air, Air Silencer Delete (purchased already and) waiting to install manual fan switch, air/fuel ratio guage.

  • #2
    No. Wouldn't cause any trouble at all.

    Probably need to do plugs / wires.
    <b>97 Camaro 3.8L M5</b><br />Car for sale<a href=\"http://terpmotors.com\" target=\"_blank\">terpmotors.com</a> Terrapin Motorsports! UMCP

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    • #3
      what kinda effect DOES a BAD IAT have on a car if any &gt;????
      Ummad!<br />2k pewter maro M5. 160 thermo, WhisperLid w/K&N Filter, Jet PCM Stage 2, Free Ram Air, Air Silencer Delete (purchased already and) waiting to install manual fan switch, air/fuel ratio guage.

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      • #4
        It would just give the wrong tempature reading. Cold = rich, warm = lean. I drove with mine unplugged for 200 miles and all I got was an SES light. I never took the time to figure out if high resistance(unplugged) means cold or warm, it depends on which way the IAT works.
        1996 white camaro M5<br />-Custom CAI, !MAF, !EGR, Hi-Flow Cat, Magnaflow Cat-back, Removed Jack/Spare/Back seats.<br /><br />2.12 60\' Best<br />15.14 @ 90 1/4 mile Best

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        • #5
          the IAT does advance/retard ignition timing but only by a couple degrees. search in the advanced section for more info on the IAT.

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          • #6
            When tempature goes up, resistance goes down (NTC). Thats the case most of the time.

            [ January 12, 2005, 01:10 AM: Message edited by: CamaroRob97 ]
            1999 Pontiac Trans Am M6 Far from stock.....
            Pics http://rides.webshots.com/album/5599...Dk?vhost=rides

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            • #7
              My IAT is out, I just bought the part to replace it... $10.00 at Autozone... But my car is really stumbling and misfiring but thats the only code that would come up... are you guys SURE that the IAT wouldn't cause a misfire??
              1997 Camaro RS W/T-Tops<br />All Stock / 200 HP

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