[stephenav1212]

This past weekend I was ridin trails hit some mud and water but nothing to serious. Later that evening I was riding and the bike cut off while in gear I tried starting back up and it'd idle okay but when I hit the gas it'd bog down and cut off and sometimes back fire. I took apart the fuel pump and there was some sand/mud in the bottom what do yall recommend doing?

Sent from my SM-N900T using Tapatalk

 

[retro]

Well, minimum ya gotta flush the junk out and change the filter... and wonder if any got inside the motor too...?

Welcome to the forums!

 

[stephenav1212]

Well, minimum ya gotta flush the junk out and change the filter... and wonder if any got inside the motor too...?

Welcome to the forums!

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 hah

Sent from my SM-N900T using Tapatalk

 

[retro]

When you get it back together with a new filter in it check the fuel pressure with a gauge... if ya got one. The pump test is in the service manual... If the pump ate a lot of dirt it'll be in poor shape.

With all the down time you're facing now it may be a good time to catch up on all the other maintenance items.

Have fun with it,

 

[stephenav1212]

Sounds good! Thanks

Sent from my SM-N900T using Tapatalk

 

[stephenav1212]

Put it pack together today. It was hard to get it started, I finally got it. I rode it around but when I went more than a quarter throttle it would bog down. Now when I try to start it I keep gettin a loud back fire

Sent from my SM-N900T using Tapatalk

 

[retro]

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.

 

[stephenav1212]

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.

Spark plug is brand new... where can I get a fuel pressure gauge? And what is causing my backfiring issue?

Sent from my SM-N900T using Tapatalk

 

[retro]

If 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...

 

[stephenav1212]

If 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...

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 guess

Sent from my SM-N900T using Tapatalk

 

[retro]

Yep, thats why the pump test is the next step...

 

[stephenav1212]

Yep, thats why the pump test is the next step...

Okay I'll see what I can do I'll stay posted.. what about dirty injectors

Sent from my SM-N900T using Tapatalk

 

[retro]

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. :-(

 

[stephenav1212]

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. :-(

It was the fuel pump.. it was only putting out 30psi. Runs good as new now thanks for the help!


Sent from my SM-N900T using Tapatalk

 

[retro]

Thanks for following up to let us know how you fixed it!