Random CEL/running lean

[mikek2111987]

Need tuning help

I have 2 seperate issues with my 03 xb9r:

-Check engine light will turn on when im at highway speeds, then turns itself off a few minutes later while still on the highway. Does not run any different.

-Changed my plugs & wires out a couple hundred miles ago, and i pulled one today to see how it was running, and it appears to be lean. It has D&D pipes, air box delete, and race ECM. What is the best and easiest way to remap my fuel system?


EDIT: These issues are resolved. I now need advice on how to map and tune. Will be purchasing a new (to me) xb12r and putting my D&D and open air box on it (leaving the race ECM on the 03 and selling it). I emailed the tuniversity guys, got a couple responses but that was it, they seem to be done.

 

[ReadyXB]

Before embarking on any path to tuning, you should understand why the CEL comes on. Do you know what the code is?

 

[user_deleted]

do this as ready suggested.

http://www.badweatherbikers.com/buell/messages/32777/146574.html

 

[mikek2111987]

Does the ECM log trouble codes, or does the light have to be on to do that method?

 

[mikek2111987]

In addition to that, i do not see any empty connectors under my seat. I found one i thought was empty, but when i popped the cap off it had a fuse inside. Any guidance here?

 

[ReadyXB]

The ECM does log trouble codes. If the CEL is Off, you will still have "historic" trouble codes to examine.

If you have a Firebolt, the data link socket is under the front fairing and most likely has a rubber plug inserted.

 

[BuellRonin]

The ECM does log trouble codes. If the CEL is Off, you will still have "historic" trouble codes to examine.

My CEL was randomly coming on and she would sputter a bit and then come back. I check for codes and there were none, but I forgot you need to select the "read codes" for it to display in the "historic" section.

I had a new injector that was a dud...installed my old one and no issues.

Cheers!

 

[ztied]

I disagree it wont always keep the codes. My story, Bike would sputter, and light would flash, but it wouldnt show a code,
Then one day it did and said 02 sensor

 

[BuellRonin]

I disagree it wont always keep the codes.

I don't disagree, I overfilled my oil once. And it fouled the O2 sensor, but the bike was trying to correct the problem without throwing a code for the O2 sensor and it took me a minute of switch parts to realize what it was, that and the fact the sensor is hard to get to.

But now I can get to it and replace in 20min.

But it's a good place to start and see if codes exist.

 

[mikek2111987]

Found the plug, grey socket with a rubber cap underneath the left hand side of the front fairing. A female spade connector made a perfect jumper. [up]

Showing code 44-Bank angle sensor. Not exactly what i was expecting, but could be much worse, so i suppose i will be replacing that before it ends up killing the bike for no reason.

Onto problem #2...remapping the fuel system. Pointers?

 

[mikek2111987]

Onto problem #2...remapping the fuel system. Pointers?

Bueller?

 

[ReadyXB]

Properly remapping the fuel system requires some effort. A good starting point would be to read and understand the Tuning Guide for Buell, which is hosted on ECMSpy.com.