Ok, here is the back story. I purchased the bike new in 2011. The first trip out, my recorded mileage was 56 MPG, not bad, and I love the fuel injection. Approximately one month later, I drop the countershaft sprocket one tooth and mileage goes down to 53-45 MPG depending on type of riding, to be expected and I'm ok with that. Now, during the winter, I've noticed my mileage was hovering in the 40-42 MPG range. I put this off to short distance riding back and forth to work with little actual engine temperature being reached. So, here it is, spring and on my first big ride, I'm struggling to achieve 45-46 MPG and the riding was nothing to get worked up about. Something seems amiss, and the tailpipe is showing black soot. My altitude is at around 4500 feet MSL. So, this week, I truck to another location at sea level and run thr bike fairly hard, guess what. 50-51 MPG? What the heck? The engine was idling higher as though the fuel injection was not adjusting properly and the mileage went up too. I think I have a bad sensor or something that is not allowing the fuel to adjust for altitude. Anyone else seen this or have any ideas?
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
My 09 ran rich at about 50 hours and I had the ecu reflashed and did away with the hego, I know the later models did not come with a hego but a reflash or update might help. Is your air filter clean and not excessively oiled ? There are values in the work shop manual for checking tps map iat and coolant temp, coolant temp is my favourite, I had a car that would flood the engine and stall due to a bad ect sensor, the ecu thought the engine was in constant cold start conditions and enrichened itself to suit. :bounce3:
At sea level the air density is higher so your slightly richer condition would be closer to stoich than 4500', I guess that would mean more efficiency through better conversion of heat energy to kinetic energy, please correct me if I'm wrong.
At sea level the air density is higher so your slightly richer condition would be closer to stoich than 4500', I guess that would mean more efficiency through better conversion of heat energy to kinetic energy, please correct me if I'm wrong.
I think you are correct on the Sea Level/4500 foot difference. As to the other issues, I haven't torn into it yet, but I'm going to. Your coolant sensor comment makes sense, and I need to research how the FI works. I'm a newbie at messing with FI.
The Husa can adjust for altitude by turning on ignition and leaving on for 5min and turning off. Then start bike. I believe that is what it says in my manual.
Thanks for that last post. I'm going to look that up. My dealer told me to start bike and let it idle for three minutes w/o touching the throttle to reset FI?
He's right.
I remembered incorrectly. You have to run/idle the bike for 5mins to reset. And it is not in the manual.
viewto...p?f=20&t=13687
#18
http://www.dirtrider.com/features/pr..._your_new_ktm/
I remembered incorrectly. You have to run/idle the bike for 5mins to reset. And it is not in the manual.
viewto...p?f=20&t=13687
#18
http://www.dirtrider.com/features/pr..._your_new_ktm/
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Rensho said:
That would be also known as a burn in. I remember that procedure was received with mixed feelings around here, could you try that and lets us know if it is effective please brian011952 ? I have tried this procedure and all I can say is you will need to move air across the radiators while doing this.
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