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  1. #1

    My FZR decided to start running rich..

    So I have the following bolt ons on my ski. R3, fizzle IC, ribbon delete, intake and exhaust. My ski has been running great with those mods. Idle was at about 12.0-12.2. Now my idle is at 10.6 and the ski runs like ass. If I give it 100% from a dead stop it bogs then take off and it doesn't even reach the limiter which is at 8650. My rpms went from 8050 to 7750. And my full powerband is rich.

    Can this be a sensor or vacuum/boost leak maybe?


  2. #2
    Banned User
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    change the spark plugs..............

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  4. #3
    SLAP~YA's Avatar
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    What's the condition of your air filter like? Might be worth after a plug change doing a run with no filter, I've had one that cholked up with salt residue it made mine run like a pig.

  5. #4
    Quote Originally Posted by Rocketman View Post
    change the spark plugs..............
    It has brand new plugs. And filter still looks good.

  6. #5
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Jmfmk3 View Post
    Quote Originally Posted by Rocketman View Post
    change the spark plugs..............
    It has brand new plugs. And filter still looks good.
    Brand new spark plugs as in you just changed them after the problem started, or brand new you as you changed them 6 months ago?
    If you have not changed them since the problem started then I recommend you change them again.

  7. #6

    My FZR decided to start running rich..

    Changed like 3 days ago when serviced. Unless they used the wrong plugs and gapped them wrong? What should it be?

  8. #7
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Jmfmk3 View Post
    Changed like 3 days ago when serviced. Unless they used the wrong plugs and gapped them wrong? What should it be?
    Did it start running poorly after they changed the plugs, or was it doing this before?
    The plugs should be NGK-LFR6A and they come pre gapped.

  9. #8

    My FZR decided to start running rich..

    It was running fine before.. Those are the plugs it fitted with. Not sure if they touched anything with the gapping. I don't have an old one to compare to.

    Ski was running 77 mph and now barely 70 and runs pig rich. I need to try riding on stock ecu. When I checked the idle on stock ecu it was still in the 10s AF which is odd.

  10. #9
    Site Admin Green Hulk's Avatar
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    Okay, so if it started running bad after the plug change chances are you have a screwed up plug. I have seen a new plug that was bad right out of the box.

    With engine idling unplug a coil and plug back in one at a time. Listen to the engine.
    Do this to all coil packs until you find one that doesn't change the sound/rpm of the engine. That will be your bad plug

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  12. #10
    Quote Originally Posted by Green Hulk View Post
    Okay, so if it started running bad after the plug change chances are you have a screwed up plug. I have seen a new plug that was bad right out of the box.

    With engine idling unplug a coil and plug back in one at a time. Listen to the engine.
    Do this to all coil packs until you find one that doesn't change the sound/rpm of the engine. That will be your bad plug
    Thanks, I'll give that a try today.

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