2003 yamaha f115txrb surging

[steplift20]

I am having an issue at low and mid range with surging. Top end she runs like a champ. Coming off of plane and low idle, she surges. I inspected spark plugs, coloration all the same no signs of lean mixture poured gas from water separator in glass bowl, no visual debri, checked oil level and coloration , looked good. traced a blue and yellow wire located under the throttle linkage under cowling to the fuse cover on engine. Upon removing fuse cover, a grey connector with a black jumper wire fell out. I know it fits on the diagnostic connector location ( this was the only one without anything installed ) and am not sure if I should connect it or should it be left out?
Could this be my issue?

[steplift20]

Does anyone know of a website that I can go to look at the fuse panel on my 2003 Yamaha ? Thanks for any help in this matter,

[spareparts]

Id guess its a fuel issue. Take a good look at the fuel filter on the engine, I'm seeing them crack at the mounting stud on top. They start sucking air. Try priming the bulb and look for a leak on the fuel filter

[steplift20]

Thanks spareparts I will do that I wanted to put up pics but I don't know how I thought I was doing it fight but it didn't go thru How do I get up pics ? Spareparts a grey connected with a black jumper wire fell out of the fuse box cover I know we're it goes but I'm not sure if I should connect it I don't know if it was supposed to be not connected just like a extra

[spareparts]

not sure about the black jumper, but the port for the scan tool has a grey cover, usually retained by a piece of clear monofilament

[steplift20]

I would love to post pics , how do you do that,

[steplift20]

I was just told that the air I'd le control valve needed to be adjusted, they said it is not bad just not in adjustment and that should take care of my problem, thanks to all for all the replys You guys are the best

[THEFERMANATOR]

Originally Posted by steplift20

I was just told that the air I'd le control valve needed to be adjusted, they said it is not bad just not in adjustment and that should take care of my problem, thanks to all for all the replys You guys are the best

Um, it's not adjusteable if it's anything like the bigger yamahas I've worked on. Most likely it was carboned up, and they cleaned it.

[spareparts]

yea, I was going to say the same thing, how ever, theer is a trick used to get them to idle better by resetting the throttle plates to put the IAC in a different range, Ive never had a need to do it, but Ive heard of others doing it. It puts the IAC in the 40-60% range rather than the 80-90% range. That still shouldn't have anything to do with the above idle surging, unless it was sticking open

[steplift20]

Still no good, dropped her off at the shop in the water, they will have to duplicate the issue on the water hopefully that will solve the problem