I drained the oil today it didn't look bad, and I flushed out all of the gas.. I ordered a new filter and o rings for the fuel pump should be here Thursday or Friday.. I just don't know much about the fuel injected bikes hahWell, minimum ya gotta flush the junk out and change the filter... and wonder if any got inside the motor too...?
Welcome to the forums!
Spark plug is brand new... where can I get a fuel pressure gauge? And what is causing my backfiring issue?Next step in troubleshooting is check the fuel pressure & volume. Replace the spark plug with a new NGK and clean/check the plug boot too.
I did pull the fuel line at the top of the throttle body and it seemed to have good flow.. maybe not enough pressure?? The dirt in my fuel pump could of possibly messed up my fuel pump I guessIf you don't have a pressure gauge you can adapt to the fuel supply line you'll probably have to pay someone else to test it. One thing you can do yourself... is disconnect the fuel line and feed the end into a small container and see if the fuel pump produces a steady flow of gas.
Careful about making fire...
Okay I'll see what I can do I'll stay posted.. what about dirty injectorsYep, thats why the pump test is the next step...
It was the fuel pump.. it was only putting out 30psi. Runs good as new now thanks for the help!The fuel pump is dependent on a pressure regulator to function... so the pump could be fine while the regulator could be bad, or vice-versa. Fuel injector could be dirty too... but the motor runs weakly at this stage in the diagnosis... so the fuel injector is working.
If you skip the pressure test in favor of replacing the injector; you'll likely waste time and money on it and fix nothing, since the FI system requires almost 50 PSI to function. Evidence shows the presence of dirt in the pump housing and a hard starting, lean and poorly running motor.
I know its a bummer... if this was a carbureted motor you'd be back in action by now with very little money spent....but the next required step is a fuel pressure test. :-(
