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  1. #1
    gmoeller's Avatar
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    Gas in oil....FZR....continued.

    Before it gets suggested....let me say that I did find the other GIO thread and I didn't find any real resolution to the problem. There was speculation but nothing concrete.
    Any help from you guys would be greatly appreciated on this.
    I, like 5001craig, discovered that I am about 1/8 - 1/4" over "full" on the dipstick AND it smells like gas. My dipstick has typically read in the middle or a little less so, obviously I have a problem.
    My mods are in signature below.

    On the other GIO thread it mentioned that with the R&D cooling some suggustions were to shut off the cooling line to the oil. I had a check valve put on that line and never opened it up so that was not it. Another suggestion was to limit the R&D engine cooling line, I have not done this.
    There was a suggestion that perhaps hitting the rev limiter excessively (which I was) could be the culprit....perhaps having something to do with the ECU and whatever happens internally when you constantly bang the limiter at WOT... I don't know, this is above my limited knowledge.
    There was also mention of cooler air temps playing a factor in the GIO problem. My air temps were between maybe 90 and 108 degrees
    (water at 80+).... not very cool.
    This GIO problem started after I installed the powershot, C-3, R&D cooling, and Riva I/c.

    Where do I start? Any help would be greatly appreciated.

    Gary


  2. #2

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    I am not 100% sure on the programming on the Yamaha ECU, but in my past experience with mercury outboards, when approaching/hitting the limiter they dumped fuel in not sure if this is a similar issue on the yamaha? might explain why there appears to be excess gio? Would be interesting to hook up an a/f meter and see what happens on the limiter.

  3. #3
    SHOBiz's Avatar
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    Quote Originally Posted by gmoeller View Post
    Before it gets suggested....let me say that I did find the other GIO thread and I didn't find any real resolution to the problem. There was speculation but nothing concrete.
    Any help from you guys would be greatly appreciated on this.
    I, like 5001craig, discovered that I am about 1/8 - 1/4" over "full" on the dipstick AND it smells like gas. My dipstick has typically read in the middle or a little less so, obviously I have a problem.
    My mods are in signature below.

    On the other GIO thread it mentioned that with the R&D cooling some suggustions were to shut off the cooling line to the oil. I had a check valve put on that line and never opened it up so that was not it. Another suggestion was to limit the R&D engine cooling line, I have not done this.
    There was a suggestion that perhaps hitting the rev limiter excessively (which I was) could be the culprit....perhaps having something to do with the ECU and whatever happens internally when you constantly bang the limiter at WOT... I don't know, this is above my limited knowledge.
    There was also mention of cooler air temps playing a factor in the GIO problem. My air temps were between maybe 90 and 108 degrees
    (water at 80+).... not very cool.
    This GIO problem started after I installed the powershot, C-3, R&D cooling, and Riva I/c.

    Where do I start? Any help would be greatly appreciated.

    Gary

    What are the settings on the Powershot? Also, what is the Lambda @ Idle and WOT? No way to measure Lambda? Remove the Powershot and ride for a while to see if you still have a suspected GIO issue.

  4. #4
    gmoeller's Avatar
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    Quote Originally Posted by SHOBiz View Post
    What are the settings on the Powershot? Also, what is the Lambda @ Idle and WOT? No way to measure Lambda? Remove the Powershot and ride for a while to see if you still have a suspected GIO issue.
    When I had everything installed my mechanic told me that the standard setting was fine where it was.... this info was based on direct info from Bill at R&D.
    I don't know the settings. I will look into this.
    I do not have a way to measure Lambda (and don't really know what it is). Maybe this will be my excuse to buy the Motec since all thats left to buy is the RRFPR.
    I will consider removing Powershot.
    I will also add a AFR meter.
    In the mean time do I just change the oil? Do I compensate for gal/oil that I can't get out when adding the new oil?


    Thanks SHObiz.

  5. #5
    gmoeller's Avatar
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    Quote Originally Posted by NZUltra View Post
    I am not 100% sure on the programming on the Yamaha ECU, but in my past experience with mercury outboards, when approaching/hitting the limiter they dumped fuel in not sure if this is a similar issue on the yamaha? might explain why there appears to be excess gio? Would be interesting to hook up an a/f meter and see what happens on the limiter.
    I will be adding a AFR meter.... thanks for the input.

    Gary

  6. #6
    Addicted Member 5001craig's Avatar
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    The wierd thing about my gio has been that it is not consistent at all. I was on the limiter HARD when I had my problem but I know I've been on the limiter since and have not had the gio issue...

    I guess I just need to ride it some more. However, it's the onlything in the water as of today and I'm sure it won't be long until it's out of the water.

    It's a sad day.

  7. #7
    gmoeller's Avatar
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    Quote Originally Posted by 5001craig View Post
    The wierd thing about my gio has been that it is not consistent at all. I was on the limiter HARD when I had my problem but I know I've been on the limiter since and have not had the gio issue...

    I guess I just need to ride it some more. However, it's the onlything in the water as of today and I'm sure it won't be long until it's out of the water.

    It's a sad day.
    Did you adjust your powershot settings at all?

  8. #8
    gmoeller's Avatar
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    Quote Originally Posted by SHOBiz View Post
    What are the settings on the Powershot? Also, what is the Lambda @ Idle and WOT? No way to measure Lambda? Remove the Powershot and ride for a while to see if you still have a suspected GIO issue.
    Is the Lambda the measurement of the Air/fuel ratio by way of the O2 sensor which you could monitor by way of an AFR meter?

  9. #9
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    Id start with getting a wideband hooked up and see whats going on with the skis. Also when these yamahas hit the limiter do they cut fuel or spark? If they cut spark then that leaves alot of fuel still being dumped in the cylinder and could be passing by the rings. Also since your running a powershot your settings could be off and you could be causing a very rich condition causing fuel to leak by the rings. Start with the wideband and try getting new prop to keep your ski off the limiter.

  10. #10
    SHOBiz's Avatar
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    Quote Originally Posted by gmoeller View Post
    Is the Lambda the measurement of the Air/fuel ratio by way of the O2 sensor which you could monitor by way of an AFR meter?
    Yep.

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