Questions & Answers for: sportster miss fire

...change in the programming so it does return. Mine does the same and keeps giving what HD calls a historic code miss fire on 1 coil. Some times it can be something as simple as aftermarket plug

My bike seems to be missing on one cylinder. I have installed spark plugs but no change. Have you verified spark on the missing cylinder. Harley's have what is known as a "dual fire" ignition system. ...

my bike was running fine and then it started backfiring a little and missing. then got worst on the way home now it runs but back fires and misses and won't idle unless i leave the chock on. Check

...fire. I have replaced coil, plug wires, plugs, carb manifold and seals but she's still miss firing. Can anyone give me any suggestions? You need to run a compression test on the engine. The ...

...sportster 883 not firing...will not start....replaced literally everything. What am I missing? replaced everything doing with fire including ignition switch, coil, plugs and wires, bank angle sensor, ...

...Sportster miss why is my Harley Davidson 883 Sportster miss firing at 75 miles per hour Hi Anonymous, and the usual suspects are: 1. Spark plugs in bad condition or partially fouled. 2. Spark plug ...

...sportster with security system wont start after battery went dead ,turns over but won't fire? Hi Anonymous, and the usual suspects are: 1. Fuel tank empty 2. Fuel supply valve turned off. 3. Fouled ...

...sportster miss firing bike missfires with a loud bang speedo backs off with orange engine light on then missfires with loud bang and motor cranks up again Hi Anonymous, and the usual suspects are: 1. ...

why is that there's no electric flowing on the hi tenssion wires of my 883 sportster i tried changing the plugs at first and it did start but after a few feet away from where i started, it back fired ...

Why is it my kx450r starts and idles fine but back fires and misses ? Does not sound like a Harley but possibly, probably you need new spark plugs