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91 Accord Idle problem.

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    #1

    91 Accord Idle problem.

    Im sure many of you have had this problem, but I cant figure it out. I have a 91 Accord, 5 speed that is all stock except for a couple minor things. The problem I am having is when it sits at idle the RPMs rev up then come down and its constant. And with it being a standar you can only imagine how often it does it, at stops signs and red lights, its really annoying. If you can help me out and let me know what it is and how to fix it I would GREATLY appriciate it.
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    #2
    Originally posted by desertratt View Post
    Im sure many of you have had this problem, but I cant figure it out. I have a 91 Accord, 5 speed that is all stock except for a couple minor things. The problem I am having is when it sits at idle the RPMs rev up then come down and its constant. And with it being a standar you can only imagine how often it does it, at stops signs and red lights, its really annoying. If you can help me out and let me know what it is and how to fix it I would GREATLY appriciate it.
    check for oil in your spark plugs. also check for any loose vac. hoses.

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      #3
      its hunting its common it happen to me and it fix it self

      http://www.youtube.com/watch?v=-gK2UUAevMY

      91 lx that I call Cinnamon

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        #4
        clean your IAC valve its right near or under your throttle body just to rule that out but if its the original piece you might wanna get a replacement

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          #5
          i had the same problem with my cb7 i try cleaning my iacv but no luck i ended up replacing it

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            #6
            Originally posted by 559cb7559 View Post
            i had the same problem with my cb7 i try cleaning my iacv but no luck i ended up replacing it
            Check for resistance across the IACV before replacing it.
            I don't have the manual near me but you should be reading between 8-15 ohms, If I recall correctly.

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              #7
              It's usually the IACV or a vacuum leak

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                #8
                Check your Timing While you are at it.

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                  #9
                  there is a link in the thread at the top of this section entitled "read here first" that addresses this problem in detail. It is a very common problem. You must have overlooked the link when you read that thread first. Because you DID read it first, right?






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                    #10
                    well i did some more searching and found i have a blown head gasket, so im gonna replace that cause comes to find out that i dont have any water flowing to my auto idle sensor so i think that might be my problem. thanx for everyones help.

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