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Thread: Stupid question but I have to ask.

  1. #21
    Still Wrenchin'! friskyfrankie's Avatar
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    Quote Originally Posted by stinkydogfilms View Post
    Gadget the idle was fine before I started having issues. I did swap an (new car take off) IAC off of a new Lo Po throttle body I've had around.
    I did fudge with the TPS. Should I check adjustment with the TPS?
    I'd recheck EVERYTHING I did after it was running well. You WILL find it!
    What I Own: 1993 Mercury Grand Marquis GS
    What I Help Maintain: 1996 CV / 1988 CV / 1988 Tempo

  2. #22
    I'm an air-conditioned gypsy gadget73's Avatar
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    can check it, but would be good to know if unplugging the IAC changes the idle. It could be stuck partly open, or there might be a leak around it. if the idle drops and/or it stalls, the ECM is holding it open for some reason. Basically isolating it to a hardware vs controls problem.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  3. #23

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    Thank you Gadget.
    With the engine warm I disconnected the IAC with the car running. The idle dropped to what i guess is normal. 700-750 rpms in park and around 600 rpms in drive. It did not stall out.
    I then drove around the block which is about a mile.
    Will it hurt anything to drive with it disconnected? I THANK YOU again.

  4. #24
    I'm an air-conditioned gypsy gadget73's Avatar
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    Should be about 500 at idle with that unplugged.

    How big is the air bleed hole in the throttle body?

    its probably not going to be happy with the IAC unplugged.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  5. #25

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    You're right. The IAC was not happy unplugged on a cold start this morning.
    The throttle body has been on since May of last year.
    I'll check and see if the PCV hose came loose again. It did come loose from under the middle of the intake when I replaced the relays and the fuel filter. If it's still a high idle
    I will probably go back to the previous IAC.
    THANK YOU.

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