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  1. #1
    ncdoo's Avatar
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    AFRs and Oil light / Limp mode during rapid deceleration

    Took my 04 RXP out for the first time this year after several over the winter mods, ET137 +3 wheel, RIVA 8650 ECU, SuperTech valve train upgrade, etc . When I get hard off the throttle at speed , the ski goes into limb mode and "OIL" flashes on the gauge for a few seconds and then clears up. I'm assuming all the oil is rushing to the front of the engine causing a momentary lose of oil pressure. Anyone else had this issue, or know ow to solve it? Also the AFRs were running rich at 11 - 11.5 with the vacuum line hooked up to the RRFPR. I tried lowering the initial FP setting but couldnt get AFRs above 11.5. I then clamped the vacuum line off and it ran 12.4 on top end. Just wondering whether 12.4 is safe to run.


  2. #2
    AtoMIC_OraNGE greenbullet's Avatar
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    oil pressure sensors under mani and front of the engine by filler neck

  3. #3
    ncdoo's Avatar
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    On the 04 its at the back. You might be thinking of the TOPS.

  4. #4
    AtoMIC_OraNGE greenbullet's Avatar
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    I have an 04 yellow and black in my garage now for a customer.. last year he had the same symptoms .. replaced the knock harness.. and replaced the 2 oil sensors and fixed the problem before I winterized the ski

  5. #5
    AtoMIC_OraNGE greenbullet's Avatar
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    off the ramp it went about 3 mins then flashed oil ... went into limp... then you got it up to temp and rode fine but as soon as it would be ridden hard and hammered on it woild flash oil again and go into limp

  6. #6
    ncdoo's Avatar
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    Mine's doing the opposite. When at WOT and then I back off completely, this is when I have the issue.

  7. #7
    dpracing's Avatar
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    Mine did the same on hard decel, I was a 1/2 quart low....... You can see it in my hole shot video after I shut down.

  8. #8
    Duke's Avatar
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    12.4 is a little on the lean side for that boost level. Recommend 11.8

    As far as your limp mode issue, try running your oil level a little on the high side up by the second bend on the dipstick and see if this still persists.


  9. #9
    Having Fun jp1300r's Avatar
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    How are your off boost AFRs, idle to say 5K?

    +1 on Duke's post. Better be some great gas too and a good I/C.

  10. #10
    ncdoo's Avatar
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    Off boost AFRs are 11.8 -12.1

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