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Misfire Cyl 1,2,3,4

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  • #1

    Misfire Cyl 1,2,3,4

    Check engine light came on recently flashing codes for misfires on cylinders 1,2,3,4. The Jeep runs rough at idle but past 1000RPM it runs fine.

    I didn't pull the plugs or anything yet. Anyone have this issue before?
    I don't always drink orange juice, but when I do, I prefer to chew it. #madpulp
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  • #2
    See what happens when you give your Jeep to Matt?
    sigpic
    Official Space Shuttle Door Gunner of the Chechnyan Space Program

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    • #3
      Originally posted by Buffalo Phil View Post
      See what happens when you give your Jeep to Matt?
      I didn't have a check engine light code in 2 YEARS

      He had it for 2 DAYS
      I don't always drink orange juice, but when I do, I prefer to chew it. #madpulp

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      • #4
        Plugs and wires Are newer. Nothing seems loose too
        I don't always drink orange juice, but when I do, I prefer to chew it. #madpulp

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        • #5
          Originally posted by ninetysix-ex-jay View Post
          I didn't have a check engine light code in 2 YEARS

          He had it for 2 DAYS
          I didn't do anything
          2000 xj 4.5 clayton longarms with wontons with a touch of
          97' zj
          2012 surbra imperza DD
          im a motivation machine like the hammer and sickle in communism

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          • #6
            Originally posted by ninetysix-ex-jay View Post
            I didn't have a check engine light code in 2 YEARS

            He had it for 2 DAYS
            Love. Jeeps.

            Check distributor cap?
            sigpic
            Official Space Shuttle Door Gunner of the Chechnyan Space Program

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            • #7
              Originally posted by Buffalo Phil View Post
              Love. Jeeps.

              Check distributor cap?
              No I didn't. Im going to grab my spark tester too. If not Maybe injectors but I never heard of 4 going at once
              I don't always drink orange juice, but when I do, I prefer to chew it. #madpulp

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              • #8
                It's a Jeep, leave it and it'll go away in a day or two.
                No worries, I'm not actually back, I'm just reminiscing about the old days.


                ForSure Motorsports
                Win or Lose, We Booze.


                Vice President of Internal Affairs at Dirty Donny's House of Hookers

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                • #9
                  A total of 4 codes came in so I changed out the IAC and reset the codes.

                  Check engine light comes back in this time flashing 9 codes and raising the idle to 1500rpm

                  4 is better then 9

                  I put the old IAC back in, reset the codes, and the check engine light has been off since.



                  WTF?
                  I don't always drink orange juice, but when I do, I prefer to chew it. #madpulp

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                  • #10
                    Originally posted by Zullius Caesar View Post
                    It's a Jeep, leave it and it'll go away in a day or two.
                    what if it doesnt go away? what then Zullo?! mine hasnt been off since i purchased it!!! lol

                    true though
                    -00 XJ. 3.5", 33s. Stuff
                    https://www.facebook.com/M3TALurgist
                    I Love Scott Decker and Erik Miller
                    -Ian

                    "Blood makes you related, Loyalty makes you family"

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                    • #11
                      you have to drive with the new IAC so it resets its paramaters or some snazzy shit like dat.

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                      • #12
                        Try what crosby said....did you reset the codes with a scanner or by disconnecting the battery? Disconnect the battery and touch the terminals together. It will reset the computer completely. Also, did you check for any vacuum leaks or anything like that? While the high rev at idle is most likely caused by a crappy IAC, it could be a vacuum leak too. If its an intake/throttle body leaking it can cause some issues

                        97 TJ that I think is pretty neat.

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