Reply With QuoteHow do you know its too rich.
Maybe a description of your actual problem will aid you better vs assuming its rich.
So my xb9r seems to not be able to get enough air, especially when starting up. Runs just fine once it's traveling. Is this just an ECM issue or might there be a physical problem.
How do you know its too rich.
Maybe a description of your actual problem will aid you better vs assuming its rich.
Too rich is an assumption based on the issues:
Very rough start, seems too be flooding though that doesn't make sense with fuel injection
Fuel injector pump seems to turn over more than it should as well which might indicate electrical issue (it sounds like it continuously pumping when i press ignition button.
Coughs and won't idle, but does better at high revs
also does much better above 20mph, which would seem to indicate that it does better with more air coming in.
that last part is the main reason i feel it's having fuel mix issues, on the rich side.
I say it seems like it's flooding because it'll cough start, some times it'll then keep turning over over time it will fall out again.
Did this issue start just out of the blue? Have you replaced your air filter recently? If you have a K&N did you recently recharge it and maybe use too much oil?
I would suggest hooking it up to ECMspy or Tunnerpro so you can get a better a view of what's going on.
I once had issues with my xb12r not wanting to start and I couldn't figure out what was wrong until I hooked it up to ECMspy and saw that I had no signal from my TPS. I replaced it, reset it and the bike fired right up!
The fuel pump once the kill switch has been turned on should prime for about a second. Are you saying it stays running even if you havent started the engine?
a few things to consider, bad Head temp sensor can cause improper fueling when cold or hot
Lagging or biased oxygen sensor, not likely considering your issue is at idle
Aftermarket exhaust? Has the ecm been tuned? These things in own or together can influence fueling during cruising, cause the global fueling or AFV (air fuel value) to be incorrect for starting, warm up or idle.
Leaking fuel injector rare and would have to be very bad, a few cycles of the ignition switch and a test crank can help you determine if this is likely, cause it would become very difficult to start.
Incorrect heat range of spark plugs, some bikes like one plug, others like something else. Theres a science behind it, but too many factors to even try to explain and figure out.
Maybe its not rich, lean can cause idle issues as well, intake seals have been a common issue on XBs common is relative to posts online, ive never actually seen an issue with these unless the bikes been molested.
ECMspy would be a great diagnostic tool for this. Unfortunately a lot issues cant be solved by a quick forum post and throwing a few parts at it. But you now have some things to research. Good luck.
Thanks crash and chickn
I'm gonna run ecm today and see what it finds.
There are no aftermarket parts on the bike, but it does have hole cut in the airbox, also i live at 7280ft above sea level.
any way i'll post what ecm spy tells me
Thats pretty damn high. Id almost bet money that youll need a custom tune for that altitude.
I live at sea level, a customer had me tune his ford from scratch, well he failed to mention he lived above 6000ft and the correctional abilities of his setup couldnt compensate enough. Also thought he had a 351ci really had a 302ci, the fuel injection was for the older firing order, yeah... **** that car.
^ dude, that car didnt have a MAP? lol
most 'high end' EFI systems have correction tables for that.....
anyways, back on subject....definitely hooking it up to a diagnostic utility would be best. my guess is that its actually probably lean. in my experience with these engines, they can handle pretty rich scenarios, but when they lean out (even at idle) to leaner that 15.5:1 AFR it REALLY has a hard time keeping up with itself. itll idle all the way to almost 17:1 but runs like crap, hesitate, sputter....all the common complaints of buell owners. lol
if its rich enough for it to run in a similar fashion to the way it runs when too lean, you would DEFINITELY smell it so bad you wouldnt be able to stand near the bike without passing out. haha
So another thing while i'm here with the bike running ecm spy. The fuel pump seems to continuously prime while i'm pushing the starter and for a few seconds after if the bike hasn't started up.
Getting some weirdness with the TPS reset as well, what the angle my tps should read with the throttle all the way open? again xb9r 2005.
Also am i gonna need to buy the eeprom from ecmspy? or can i run the necessary diagnostics without it?
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