2003 yamaha f115txrb surging

[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,

[SkunkBoat]

Exploded views & part#s

http://www.boats.net/parts/search/Ya...XRB/parts.html

Have you tried spraying carb cleaner in the throttle bodies and air control valve?
see "Intake2" diagram, #10. Looks like maybe an air filter #13 on the control valve assy also...

[steplift20]

No we didn't do that but we think it's the throttle positioning sensor If we put it in doesn't look to hard, I heard it has to be adjusted, does it ? and how do I do it

[spareparts]

leave the tps alone, if you dont have the software or a voltmeter dont mess with it. unless its idling odd, the tps is probably ok. there is a chance it could have a dead spot, but its hard to find,. You can try this trick, with the engine running and the cowl removed, tap on the computer with a screw diver handle, not real hard. See if it changes te way it runs. F115 computers are known to give issues.

[steplift20]

It is idling odd, at mid range and low range like putting it on the trailer ,( high range is fine, ) but what your saying is I do need to adjust it the tps I will tap on the computer to see if it does change

[THEFERMANATOR]

You can pick up a cable and software off of ebay for $120 I believe I paid. If you were closer, I'd hook it up for you. I'm not sure if I could copy my disk, but I've heard you can find the software online to download, then you get a usb to obd2 cable, and make 3 jumper wires to connect it(I opted for the premade cable because I wanted it to be a clean connection).