Question about 1986 Honda VT 500 C Shadow

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1985 honda VT 500c shadow one cylinder when engine hot

When engine is cold fires on two cylinders (runs great) when engine warms up no spark at front cylinder. have repalaced coil, high tension leads, spark plugs and cdi, could it be one of the pick up coils?

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Hi and welcome to FixYa,

Soon as the problem comes about, check the pulser coil:

  • passive - depending on the manufacturer of the pulser generator, anywhere from 50 to 500 ohms. As long as it is not shorted (0 ohms) or open (no reading), then it should normally be good.
  • active - while cranking or engine running, check the voltage coming from the pulser coil. It would be a pulsating 0.5VAC. It might be to your advantage to use an analog / needle type voltmeter.
Post back result.

Good luck and thank you for using FixYa.

Posted on May 28, 2009

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Initially, if there is spark on the plug of the front cylinder, then it would be a fuel issue. Pls try:
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