HELP!!! Engine revving by itself!!!
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This is a discussion on HELP!!! Engine revving by itself!!! within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; On the way back from visiting some friends the other day, my car starting reving on its own out of ...

  1. #1
    Registered User Rippa's Avatar
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    HELP!!! Engine revving by itself!!!

    On the way back from visiting some friends the other day, my car starting reving on its own out of no where! I was in neutral the whole time it was reving. It was steady reving not pump reving. It started on its own at about 1000 rpms then gradually went up all the way to 3500 rpms. I pulled over and checked some vacuum lines but didn't see anything out of place. So I turned the car off then on but it started up again, only this time it didn't rev so high, it was back down to about 1500. So I drove home and after taking it through fifth, it calmed down and was back to normal at 500 rpms at idle. I took it out today, everything was smooth until about half an hour into the ride and it started up again!! Oh yea, its not the recent clip for the cruise control, I had that done to see if that solved the problem but it didn't. So its gotta be something else. I don't know what's wrong. Can anyone help??? Has this happened to anyone else???? Any and all info would be greatly appreciated!!


    Will

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    Sounds like a throttle position sensor. If it were me, I would start there.

  4. #3
    Registered User rallymaniac's Avatar
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    sounds like somthing i experienced with a rental car that i rented for Rally Deutschland last summer in Europe. It was Ford Mondeo and was doing the same thing. When i was driving the revs wouldn't go below 3500 and same thing in neutral. It turned out to be a MAF sensor. I returned the car. I was thinking about driving it but a friendly mechanic told me that it will continue doing it for a while and later the car will just die and not start again untill you take care of it. YOu may wanna give MAF a try.
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    Registered User driverj's Avatar
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    Could it possibly be related to the cruise control recall? Have you taken it for that?

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    Registered User rallymaniac's Avatar
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    -/\/\/\/\- did you read his post???
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  7. #6
    Registered User driverj's Avatar
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    Originally posted by rallymaniac
    -/\/\/\/\- did you read his post???
    Not the whole thing. I stopped half way.

  8. #7
    Registered User Rippa's Avatar
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    Well I got rid of the revving problem!! It was the throttle and cruise cables, They were too tight!! So I loosened them and the car is as good as new again!! So thanks for all the input, it was greatly appreciated!!

    Thanks again,
    Will
    310whp / 309trq @ 19psi
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  9. #8
    Registered User driverj's Avatar
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    So I was right but wrong at the same time.

    Good to hear.

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    Your idle should be around 700-750, 500 is too low.
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    Originally posted by driverj
    So I was right but wrong at the same time.

    Good to hear.
    Ignoring the thread and still getting the right answer. Good work
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  12. #11
    Registered User blackshadow's Avatar
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    Do you have a aftermarket BOV? I had this happen to me twice as well, hasn't done it in over 15000 miles though. I believe in my case it was the piston of the BOV getting stuck. Problem was exactly the same as you desciribe yours.
    autobahn storming scooby

  13. #12
    Registered User driverj's Avatar
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    Originally posted by Trailboss
    Ignoring the thread and still getting the right answer. Good work
    I was actually reading what he wrote but I may have gotten distracted (shinny things). I remember reading the 1st half and just spewed an answer without reading again. Possibly Adult ADD.

  14. #13
    Registered User AWDrifter21's Avatar
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    idle should be 500 rpm stock....

    when I installed by BOV and then put my stock bov back on, i lost the recirc hose so I had to drive to subaru to pick one up and my idle was flucuating like crazy, but when driving, the stock BOV sounded just like the HKS, but not as loud... .

    I think the stock BOV rocks if it was strong enough for 100% atmospheric., sorry for robbing the thread

    anyways, what do you think could have cause your throttle and cruise control cables to get messed up like that?
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  15. #14
    Registered User Mad WRX's Avatar
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    Originally posted by AWDrifter21
    idle should be 500 rpm stock....


    750

  16. #15
    Banned dark_rex's Avatar
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    Originally posted by driverj
    Could it possibly be related to the cruise control recall? Have you taken it for that?

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