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Thread: SP2 running lean below 5000 rpm

  1. #31
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    Can someone confirm which way the CO trim pot works on the P7 ECU, I've read conflicting advice; clockwise or anti clockwise for a richer mix?
    Thanks

  2. #32
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    pretty sure it's anti clockwise.
    Brad The Bike Boy

    www.bikeboy.org

  3. #33
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    Thanks Brad
    I have now bumped the fuel pressure up to 3.5 Bar and moved the air temp sensor to the front of the bike, underneath the dash. I haven't had a chance to take the bike back to the workshop yet and check the A/F ratio again. I have also purchased a Fast by Ferracci stage 2 chip that should arrive by the time I get back from work. I'm hoping that the higher fuel pressure and relocation of the air temp sensor will do the trick, but purchased the FBF chip just in case!

  4. #34
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    oooh, stage 2.
    Brad The Bike Boy

    www.bikeboy.org

  5. #35
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    Quote Originally Posted by brad black View Post
    pretty sure it's anti clockwise.
    Brad-- why does my old brain recall that you can keep turning the trim pot and it will go from 0-5 volt and then start over. I dimly recall that I would use a DVM to set it at 2.5 V and then use and O2 sensor to track the change-- I think you had 1 1/2 turns in each direction before you started over. I have no idea why I remember that this happens with the trim pot-- so I could be wrong.

  6. #36
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    Brad
    you have some reservations about a stage 2 FBF chip lol

  7. #37
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    Quote Originally Posted by MarkT View Post
    Brad-- why does my old brain recall that you can keep turning the trim pot and it will go from 0-5 volt and then start over. I dimly recall that I would use a DVM to set it at 2.5 V and then use and O2 sensor to track the change-- I think you had 1 1/2 turns in each direction before you started over. I have no idea why I remember that this happens with the trim pot-- so I could be wrong.
    it rolls over at each end of the travel with no further change - 2 turns either side of the 2.5v centre point.

    from memory - to reset it you have to go at least 4 turns in the opposite direction i think
    Brad The Bike Boy

    www.bikeboy.org

  8. #38
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    Quote Originally Posted by fnqal View Post
    Brad
    you have some reservations about a stage 2 FBF chip lol
    the whole stage thing just makes me laugh. it's like the old "3/4 race cam" back in the old school days when the race stuff was the cool stuff and that just meant really big, but not the biggest.

    depends also what is changed. these eproms have ff on the original fuel maps. there is no bigger number. you can go around that with the environmental trims tho.

    send it to me and i'll tell you what's different.
    Brad The Bike Boy

    www.bikeboy.org

  9. #39
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    Thanks for the explanation Brad. I'm back at work at the moment and won't be back in Aus for a couple of weeks. I would be very interested to know what is different from the standard chip

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