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  • Idle

    Cant seem to work out my idle it hunts around 1150 ~ 1250 after its warmed up (sitting). Yet after i go for a ride its at 1500??

    Yoshi exhaust
    Gutted Y pipe
    Removed exup
    Slightly dirty stock air filter.
    TPS Sensor for my vin isnt affected (Set to 16/94) changed to 18/96

    Before i bought it, it got dynod at a shop (they also installed PC3 and quickshifter) and the idle was above 2200 after ride, changed the map and TPS setting on PC3 correctly and its down to 1500.

    Any ideas, throttle body sync / Idle Air Control Valve ??
    Last edited by Halo_2; 11-05-2011, 01:33 PM.
    "Some people are like clouds. When they disappear it's a beautiful day"

  • #2
    Vacuum leak. Hotter it gets, the larger the leak as parts expand. Try spraying the junctions in intake with a bit of ether, will speed up when you hit the hole. Also check ports for vacuum gauges, might have a loose screw or dried out vacuum cap.
    Good luck.

    Comment


    • #3
      Halo,

      My Sv1000 would not idle smoothly and it would hunt up and down the revs, I then balanced the throttle bodies, problem solved.


      buelllord
      Women are like motorcycles, they should be ridden hard and kept well lubricated ...

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      • #4
        Had mandurah yammie checked for vac leaks, cracks in throttle body turned out to be a loose spark plug

        Suprised it wasnt picked up on the dyno
        Last edited by Halo_2; 10-05-2011, 01:05 PM.
        "Some people are like clouds. When they disappear it's a beautiful day"

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        • #5
          Good for you. That's a cheap repair.

          Comment


          • #6
            Came back after a long run
            Disconnected the power commander, didnt help

            Cylinder 3 is running hotter than the others, 60 degrees / spark plug tip white same cylinder that had loose spark plug

            compression tested all fine
            Last edited by Halo_2; 21-05-2011, 02:38 PM.
            "Some people are like clouds. When they disappear it's a beautiful day"

            Comment


            • #7
              Can the plug to the injector be tested electrically ??
              "Some people are like clouds. When they disappear it's a beautiful day"

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              • #8
                Originally posted by Halo_2 View Post
                Can the plug to the injector be tested electrically ??
                In theory you could measure the current and pulse the injector. If you know the resistance of the injector and the duty cycle of the pulse, you should be able to calculate any drop at the connections.

                Very bad connections can end up showing visually, just look for dulled or burnt terminals.
                Being an Australian is not an excuse for being dumb and racist.

                Comment


                • #9
                  Still there, diagnostic mode on the injectors passes

                  Added sound clip exhaust starts sounding different when it gets to 60c

                  Last edited by Halo_2; 21-05-2011, 10:33 AM.
                  "Some people are like clouds. When they disappear it's a beautiful day"

                  Comment


                  • #10
                    They says its either vacuum or injection
                    Last edited by Halo_2; 26-05-2011, 08:14 PM.
                    "Some people are like clouds. When they disappear it's a beautiful day"

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                    • #11
                      Taken to two dealers both say there is a problem but having trouble locking it down, anything else they could check ???
                      Only happens above 60c

                      Fuel ok
                      Spark ok
                      Compression test ok
                      Last edited by Halo_2; 26-05-2011, 08:13 PM.
                      "Some people are like clouds. When they disappear it's a beautiful day"

                      Comment


                      • #12
                        Leakdown passes
                        valve clearances passes
                        Swapping injectors nothing
                        No vacuum leak
                        continuity test passes

                        Turns out it may be something with the idle air control valve
                        Last edited by Halo_2; 24-05-2011, 05:43 PM.
                        "Some people are like clouds. When they disappear it's a beautiful day"

                        Comment


                        • #13
                          idle air control valve a good chance, iv had a tricky one like this before, which was temperature related too, wasnt there then it was then it wasnt again when it got really warm. Turned out to be the temperature sensor itself, which does play a role in the fuel and ignition settings that the ecu calculates. New sender fixed that one, only managed to find it on a hunch but the sender was easy to get to and pretty cheap for that particular bike. Could be a number of things but looks like you have eliminated a lot of them so far.


                          (edit) Just re-read, you were saying about white tipped plug. If your able to, pop that injector out and swap it to a different cylinder, clean up your plugs or better yet put new ones. See if the problem switches cylinders, if it does then problem found, if not then injection should be eliminated... Those infrared handheld thermometers are a godsend for watching temps build up in individual exhaust pipes to see what each cylinder is doing.
                          Black Cat Photography

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                          • #14
                            Actually its the thermo wax assembly his circled, seems abit iffy to only affect cylinder 3 though
                            Last edited by Halo_2; 26-05-2011, 07:51 PM.
                            "Some people are like clouds. When they disappear it's a beautiful day"

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                            • #15
                              The thermo wax assembly could be your idle speed issue, but it shouldn't be able to cause a problem on just one cylinder though. Have the throttle bodies been balanced ?
                              Being an Australian is not an excuse for being dumb and racist.

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