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Thread: misfire and iridium plugs

  1. #1
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    misfire and iridium plugs

    My bike started a missfire on sunday at the end of the ride. Not all the time just ocasionally when gently accelerating 3-4000 rpm under load.

    It feels just like a plug breaking down , a split second switch off. of 1 cylinder.

    I have no fault codes as coil was the first thing that came to mind.

    My next thing is to put the old plugs back in , I have recently fited new iridium plugs, and just wondering how any of you are getting on with them.

    I am not blaming the plugs its just a hunch , that I probably have all wrong.

    The other thing I have noticed lately is the tickover is a little haywire. sometimes its up around 1500 and now its at 1200 and the engine feels a tiny bit lumpy 1300 was always about where it sat.

    It goes fine when you rev it.
    Exspert?? Ex = has been, spert = a drip under pressure.

  2. #2
    apriliaforum expert QuickSilverCapo's Avatar
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    Ian,

    I just put Iridium plugs in my bike. Everything seems fine....Bike feels smoother and I think MPG is a little better.
    But I got a bad tank of gas up in Mass. last week and that REALLY caused my bike to run like shit. Thank God for Seafoam fuel treatment

  3. #3
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    Funny you should say that . Not heard of seafoam but I guess it a fuel aditive to dissolve water .
    I use Dry fuel and put some in the tank yesterday and wen't for a ride , no missfire .
    I am not sure if the problem was water but I did clean out the tank a few weeks ago after a misfire problem and found some water. I didn't have a new filter for the tank so maybe some water was left in there .
    I hope thats all it was , I really didn't think a fuel injection bike would be too bothered by a little water in the fuel but maybe Iam wrong ,
    I used Wynns Dry fuel

    I also noticed the same improvement with the iridium plugs but as I said at the time was it just new plugs or the iridium , that we will never know unless we fit some new standard ones now and see if there is a difference .
    Exspert?? Ex = has been, spert = a drip under pressure.

  4. #4
    apriliaforum expert QuickSilverCapo's Avatar
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    Heres the stuff that helped me out....My bike would barely run, and this stuff worked instantly. I told the parts guy what was going on and that I thought it was bad gas. He said "We just got this stuff in, and its the best on the market."
    http://www.seafoamsales.com/motorTuneUp.htm
    Im sure other treatments may have worked, but I was VERY impressed with this product and how fast it worked.
    I have read posts about bad gas from other Capo owners. I figured that had to be it or Id get an EFI flash. It wasnt just hesitating...It was hard to start, then would barely run at idle or low RPM.

  5. #5
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    Geez that stuff is the one stop fix it.
    I guess you had water in the fuel and used it as a fuel aditive to get rid of the water, you don't actually say , as the stuff can be used in other ways.

    The wynns product is mainly for water in fuel but is also an injector cleaner etc, although they make a specific injector cleaner for petrol engines. I am thinking of running a tank full through with that in also . It allways cleaned up the way injected cars ran so I reason it can't do any harm to the bike.
    Exspert?? Ex = has been, spert = a drip under pressure.

  6. #6
    apriliaforum expert QuickSilverCapo's Avatar
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    Quote Originally Posted by ian-parkes
    Geez that stuff is the one stop fix it.
    I guess you had water in the fuel and used it as a fuel aditive to get rid of the water, you don't actually say , as the stuff can be used in other ways.
    It apparently can be used in the crankcase also...But yes, because I thought the problems were bad-fuel related, I put it into my gas tank.
    I may put a little in the tank every once in a while for maintenence.

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