Question about 2004 Harley Davidson FLSTC - FLSTCI Heritage Softail Classic

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Carburator hesitates and back fire? - 2004 Harley Davidson FLSTC - FLSTCI Heritage Softail Classic

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Sounds like your accelerator pump is not working correctly. Remove the air cleaner cover and the filter element. With the enigne OFF, look into the carburetor and crank the throttle grip wide open. You should see a stream of fuel squirt into the throat of the carb. If not, your accelerator pump needs rebuilding.

To rebuild the pump, remove the air filter backing plate. Then remove the four screws that hold the float bowl onto the carb. Make sure your petcock is turned off. If it's a vacuum operated petcock, it should be off. Drop the float bowl down and remove it. Look into the bottom of the bowl and see how much trash or whatever is in there. Turn the bowl upside down and remove the two screws left that hold the accelerator pump cover on. Underneath the cover you'll find a small spring, a diaphragm, and an o-ring. Replace the diaphragm making sure that you get it in in the correct direction. There's a lip that goes into a groove in the float bowl. Position the spring and o-ring and reinstall the two screws that hold the cover on. Replace the float bowl on the carb making sure you get the pump push rod into the hole that it goes into. Install the four screws, the backing plate, the air filter, and cover.

I hope this helps, Good Luck, Steve

Posted on May 03, 2010

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