Stumbles off idle

[chvyeter]

My busa is stumbling off idle. I'm thinking maybe it's a tps sensor bad or out of adjustment. How do I check it or any other tips on what to look at? I haven't found the ohms the tps should be set at online yet. Any help or suggestions would be greatly appreciated. Bike also runs really rich so I just change the plugs. Still rich tho.

 

[Quiksilver]

There is a pug in the tail. You have to use a jumper wire. I have a 2002 and there's one way it can go. Connect the jumper and the dealer mode comes on. I set my tips in the middle.

 

[Busarider007]

What does it idle at? should be around 1100-1250 rpm, if not increase your idle setting located at the side of the bike.

 

[chvyeter]

I have the idle set around 1100 rpm. I set the tps after I removed and cleaned it in dealer mode. Same problem is there. Didn't change at all.

 

[Quiksilver]

No codes in dealer mode? Have you checked what the plugs look like? Mayne check that all coils are firing.

 

[chvyeter]

No codes and I just replaced the plugs last weekend. Coils I haven't checked but other than around 2,500 rpms and below the bike runs perfect. Still seems like it's rich though.

 

[Busarider007]

What year is your bike? check your fuel pump and fuel filter, could be clogged.

 

[chvyeter]

What year is your bike? check your fuel pump and fuel filter, could be clogged.

It's a 2001 year model

 

[chvyeter]

Fixed it. Checked the vacuum lines and found one from the sensor on the frame that connected to the valve under the airbox wasn't plugged off. Plugged it off and bike runs perfectly.