Question about 2003 Harley Davidson FXDL Dyna Low Rider

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Most common ignition failures my bike died at stop light I put new plugs in it ran for 10 seconds and stoped runing

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Hi Dan, it's either electrical or fuel related. Make sure your fuel valve is functioning properly, it needs vacuum to work, your gas cap is venting properly, it has a one way valve. If you can get it running again, remove air cleaner cover and spray some starter fluid in the carb when it starts to die, if it keeps on running then you know it's fuel related and your carb needs to be inspected.
If it's electrical check for spark while cranking, disconnect plug cables leaving spark plugs in engine, attach a 3rd plug to any cable and ground threads. Computer will not send spark if it detects no compression. Check battery voltage and connections, make sure they are clean and tight and you have at least 12.5 volts or higher. It could be a MAP or CKP sensor is failing or has failed. Try retrieving any trouble codes that may have been generated by this issue. If you need assistance in performing this procedure, go to the web site below and it will walk you through it. Good luck:

Posted on Apr 24, 2015


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