| Author |
Message |
    
Jsimpkins
| | Posted on Monday, August 27, 2007 - 02:55 pm: | 
|
Hello all,
I have a 2002 X1 with the full Buell Race kit. When running correctly the bike really hauls butt. 2nd gear wheelies the works. However, there is a really annoying dead spot/lean spot at around 3000 to 3500 rpm. The bike surges, coughs, and sputters. It acts as if the AFV is leaning down until it reaches a point where the bike won't run any longer, then enriches the mixture back up and it starts all over again. If I blip the throttle it responds normally. I almost think the ECU is resetting, which causes the engine to cut out, like a reboot of a PC. If it weren't for this one annoying thing, the bike would be perfect for me.
I have about 12000 miles on it now, and its always sorta done this in varying degrees. I do have the PDA/Scan tool and have done a number of TPS resets. This helps a little. No errors codes reported either. I live in Denver and on a hot day the density altitude can reach about 9000'.
Second, I've heard that disconnecting the white wire from the ECU will improve mid-range. Any truth to this?
From reading what other people have posted it looks like it might be the side stand switch or a leaking intake seal.
Thanks,
jason |
Jsimpkins
| | Posted on Thursday, August 30, 2007 - 05:37 pm: |
|
Just an FYI,
I think I may have stumbled onto something with my X1 and its stumbling
problems. I pretty much figured that the mixture was too lean between
1000 and 3500 RPM. So the issue was how to richen the mixture. I had
done a number of TPS resets and that did not clear the
problem up completely. So I decided to try and enrichen the
mixture by faking the ECU out. I did the normal TPS reset, pushing the
throttle forward until it slightly sticks. Then I zeroed it there. Next
I used the idle adjuster to slightly open the throttle while watching
the VDST until the throttle read .20 degree. I then zeroed the tps at
this point. THis causes the ECU to think the throttle is slightly more
open than it really is and this in turn enrichens the mixture just a
tad. The bike runs great now; I've experienced no stumbling, coughing
or surging since doing this. It also seems (seat of the pants) to make
more power as well. Its much easier to lift the front tire and carry it
than before. I was able to get a top speed run of over 140MPH as well.
Just an FYI, not sure if you know about this trick. |
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2002 X1 Running rough at 3000 to 3500 RPM