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Thread: Fuel pump not priming but works on it's own

  1. #21
    Junior Member
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    Feb 2019
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    Well I already ordered a replacement ECM, so hopefully this will be the end of it.

  2. #22
    Senior Member Cooter's Avatar
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    Thats a lot for a used ECM, you can get one from SPHDOnline.com with the correct stock programming for that much, OR get one from IDSpd.com for the same $ with any custom or Race programming you want to match your muffler.
    Even the Buell Race program for a stock muffler is better than the lean EPA tune.

  3. #23
    Junior Member
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    Feb 2019
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    A blank one from St paul is $280 + shipping. A race one from IDSpd is $320.

  4. #24
    Member TapRoot's Avatar
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    Sep 2018
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    Hope it all works out with the new ECM. The 6 volts is an indication of a bad ground(ed) conductor or lack there of usually and the meter will give you a semi reading through the leads, which is why DMM aren't for higher voltages, if you have a loose connection they can still pick up a completed circuit, unlike a set of wiggys where it throws a load on the circuit and creates or shows a fluctuating open but DMM are great for low voltage. At first I was thinking maybe you had a loose terminal connection within the relay housing and the DMM was reading good but when a load was applied you would loose continuity but you have seem to made it clear that you've isolated it.

  5. #25
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    Thanks! I definitely appreciate the help

  6. #26
    Senior Member Cooter's Avatar
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    You're welcome

  7. #27
    Senior Member rb70383's Avatar
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    Jul 2008
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    260
    That does seem to isolate the ECM. Another test, if you're inclined is to measure the b/y while the pump is running. Put the red lead on the pump - terminal and the meters black terminal at the ECM plug. With the pump running you should have no voltage drop. Any voltage is actually resistance.



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