Question about Harley Davidson FXSTB Night Train Motorcycles

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V/H short shots W/new air cleaner and fuel pack ran fine for three months now check engine light on and runs rough.

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Check your plugs, if the fuel pak is set to rich the plugs will get fouled allowing it to run rough or not at all.

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Posted on Aug 27, 2009


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The cylinders are numbered as on the spark pack you changed. You might have done better putting the seafoam in the tank as an injector cleaner. Not sure why you changed so many parts, you seem to know how to get the codes from test connector lead hookup and the blink pattern. You might also want to check the fuel rail pressure and the crank and cam angle sensors. Before replacing the injector, swap the #4 injector with the adjacent one and see it the code moves with the injector or stays put. If the code stays on #4, then check the injector wiring, if it moves clean or replace the injector.

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