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Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Have an ’03 ultra that starting missing and losing power this weekend after a short ride. \\; The further I went, the worse it got. \\; I got back home, but with very little power. \\; The check engine light will come on when the popping is occurring but it goes back off at idle. \\; After start-up, engine light is telling me there is a historical problem but not a current problem.  \\;  \\; I found the link on the forum here on how to check codes on an ’03 by jumping across terminals 1 &\\; 2 of the diagnostic plug under the right side cover, but I’m not getting any codes to flash. \\; Is it right to get no codes at all? \\;  \\; BTW the missing started after fueling up, so I drained the tank and put fresh gas in. \\; I let it run in the shop for 10-15 minutes to let any old fuel get out of the pump and it ran fine. \\; But when I shut it off to back it out for a road test and restarted it, the problem came back. \\; I have the basic service manual and just ordered the electrical manual yesterday. \\; Any thoughts on the codes or potential culprits?  \\; Thanks
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