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Thread: serious probs after warmup

  1. #1
    Registered User
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    Jan 2004
    Location
    Toronto, CA
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    108

    serious probs after warmup

    I haven't driven my car for the past two days, and
    this morning, it started acting weird. As I was
    warming up the car and scraping the ice off my
    winshield (it was around 10 degrees out), I noticed
    that about a minute after I started the ignition, the
    car started to automatically rev up the engine in
    increments of 1-1.5 seconds on its own. When I
    shifted to D4 (I have an auto), it stopped revving.
    However, as I was driving towards school, it
    intermittently started doing it again. At the first
    stop light I reached, with my brakes depressed, it
    kept revving the engine forcing me to creep up and I
    had to engage the e-brake at every stop light and stop
    sign on the way to campus so that I don't hit anyone
    or anything.
    This occurs whether I'm in park, reverse, d4, d3,d2,
    d1. While in drive, without putting my foot on the
    accelerrator, the engine will rev up to 2.5rpm to
    20mph (should normally be at 1.5-2.0rpm at that speed)
    and stay steady at that speed for about 1-1.5 seconds,
    then drop to 0, then repeat the process. If I press
    the brakes while it's doing that, my whole car lunges
    forward as if I slammed the brakes, then it'll rev
    itself up again. When I press on the gas while it's
    revving, the heat needle will go all the way to hot,
    and come down only when I press the brake (remember,
    it's 10 degrees out). This only happened once while I
    was looking for a spot in the parking lot.
    Can anyone help me diagnose this problem???? Any help is GREATLY appreciated.

  2. #2
    Black Pearl Hondaman's Avatar
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    Oct 2002
    Location
    Wisconsin
    Posts
    2,517
    I would start by checking your engine grounds. It sounds like you have a bad frame ground somewhere.

  3. #3
    Registered User
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    Jan 2004
    Location
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    Quote Originally Posted by Hondaman
    I would start by checking your engine grounds. It sounds like you have a bad frame ground somewhere.
    Umm... can you describe that in terms that a mechanically deficient person like me can understand?

  4. #4
    Black Pearl Hondaman's Avatar
    Join Date
    Oct 2002
    Location
    Wisconsin
    Posts
    2,517
    Quote Originally Posted by chahsiubow
    Umm... can you describe that in terms that a mechanically deficient person like me can understand?

    Sure can!!!

    On your battery, you have a positive an negative(ground) terminal. The Postive terminal connects to your main fuse box and to your starter. The Negative connects directly to the fender wall.
    Electricity will travel in a circular path in your car from positive to negative(or vice versa, I don't remember) Anyway, all electrical components on your car need proper grounding to prevent stray/intermittent voltage from messing with it. There are various grounding spots on your car to prevent this from happening. If one of the grounds should lose connection and stray/intermittent voltage should be introduced into an electrical component, it can cause it to act wacky. I would start by checking all these grounding spots to make sure that's not the problem. It happens from time to time, especially in high salt environments. (i.e. if your local road crews use salt to melt ice on the roads or along oceans)

    I've attached a couple of files (pdf format) to show you where the grounds might be you should look at.

    Good luck. If I'm wrong in any of my statements everyone, feel free to correct at your discretion.
    Attached Files Attached Files

  5. #4
    Honda-Acura
    Honda S2000

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