Engine keeps revving after shifting into neutral....
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Thread: Engine keeps revving after shifting into neutral....

  1. #1
    NECO Member
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    Engine keeps revving after shifting into neutral....

    In the last couple of weeks, my car (2000 V6) has been revving up after I shift into neutral. It's usually at about 2500-3000 rpms when driving, then for about 5 seconds after i shift into nuetral, it keeps revving up to about 3500-4000 rpms. What might cause this?

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  3. #2
    Banned jrak123's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    you need a new IAC valve or you can do the throttle hang fix. Do a search for throttle hang fix in the how to section and it will guide you through it.

  4. #3
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    Re: Engine keeps revving after shifting into neutral....

    I was always told this was normal operation (burns off excess fuel for emissions reasons).
    2000 ATX V6 "C/ZN" (Silver Frost) - SOLD 5-23-08

  5. #4
    Sometimes Faster than Dan Lifetime Platinum MemberSuper Moderator B3NN3TT's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    Quote Originally Posted by AnthonyP
    I was always told this was normal operation (burns off excess fuel for emissions reasons).
    That is true, but going up to 4000 RPM's is definitely wrong.
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  6. #5
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    Re: Engine keeps revving after shifting into neutral....

    Hi,

    I've recently got the EXACT same problem with my 2000 V6 manual - going into neutral , especially from 2nd and 3rd after a highway run, and the revs go up to 3.5 grand or so. Try to kick it down, and it stays up at the highest rev you gave it.

    Did you ever resolve this?

    Cheers,

    Micah

  7. #6
    Banned jrak123's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    replace the IAC valve... but you can first remove it and try cleaning it out with come carb/choke cleaner.

  8. #7
    NECO Member MercCoug99's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    im gonna gues the with the fact my engine just hangs at 2000 after i take it out of gear i have throttle hang too. am i correct?


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  9. #8
    NECO Member jen1274's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    My car started doing this yesterday. Also before that happened, the air conditioner was making noise - it has, since I've had the car - like a clicking noise, but then, yesterday afternoon, it started making a high-pitched humming noise - when I turned the AC off it quit. But then, it started doing the revving up in neutral thing. Sound like the IAC valve to everyone?

    Oh, and who knew the damned thing (IAC valve) would cost so much? Ridiculous! Good thing, I am semi-mechanically inclined and think I can figure out how to change it myself - I have the Chilton manual.

    Any input at all would be appreciated. Thanks!
    Last edited by jen1274; 2007-08-04 at 01:46 PM. Reason: Typos
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  10. #9
    NECO Member jen1274's Avatar
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    Confused Re: Engine keeps revving after shifting into neutral....

    SERIOUSLY? No one has had this happen to them? Wow, that's just great.
    Well-behaved women rarely make history.

  11. #10
    Capital Curmudgeon Lifetime Platinum MemberModerator skater's Avatar
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    Re: Engine keeps revving after shifting into neutral....

    Take it easy - you left all of 6 hours on a Saturday in August for people to respond... People are out doing things.

    I would suspect the IAC valve or a bad throttle return spring (or something in that area, like the cables themselves). I'd say take a look at the throttle and see if it's working normally, not binding or anything, and if it's fine go for the IAC.
    1999 Cougar, Laser Red, 3.0L V6, MTX (a lot more fun)
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