1999 Ultra & fuel consumption

[wannaride]

When I first got my 99 Ultra I got 50mpg 2 up. Now I am getting 37mpg 2 up. What all can I do to get it back up there? As far as I know the only real thing that can be changed is the TPS. I used a gas analyser & set it by the TPS & went from 1000-600 HC down to 200 at idle & 150 @2500rpm's. I tried setting up the TPS by the manual but that had the HC way up there. All the sensors were replaced new about a year ago. I have adjusted the valves a couple of times also. Moving the TPS just seems to be a lot from where the manual says to start. I don't want to run it lean is why I stopped @ the 200-150HC's. Anyone with any idea's

Toby

 

[RibEye]

All other things being equal, sometimes, an intake leak can cause your mileage to drop significantly.

Enjoy,
Rich P

 

[Bodeen]

How many miles on the bike?

 

[Webbtron]

I'd guess you probably have changed how you are riding. Using the power band to improve your position on the highway, thus keeping you safer. Now be careful Toby because I have rode with you and you are not a plodder.

 

[wannaride]

Checked for intake leaks, exhaust leaks, not there. I have fought the intake leaks before. Craig, drive it the same since I got it & am some what easy with my wife on the back. Will try to drop the HC's down more, just don't want to run it too lean & am not sure if there is anything else that can be adjusted to change fuel mileage. I am not trying to get it back to the 50mpg's since I think fuel quality has gone down hill, but would like to get it back up to the mid 40's. By the way, it has 91000 miles on it.

Toby

 

[Bodeen]

With 91K on it, I would do a compression check on it. It may just be getting long in the tooth and some freshening up.

 

[wannaride]

I'll check that, my compression testers are at the shop, so will try to remeber to bring it home & check it. But I am thinking that I did that @ the start of winter when it started to act up on me.

Toby