xb9sx runs rough after fill up

[mpaternoster]

Hello all,
I have searched for this and it seems over filling the gas tank can cause some running issues.

Twice, soon after getting gas the bike has started stumbling and cutting in and out-like riding a bull sometimes.

The first time this happened, I cleared the codes to start fresh with my buelltooth(I bought the bike used 2 weeks ago).

The second time, this morning, I got gas, filled to just below the opening while on the side stand. I went on my way and about 4 miles in it started running rough.

I made it work, let it idle for a while, stopped it, started it and eventually it idled and rode normal for about a mile. I checked the codes using the jumper method and if I am reading correctly it shows code 11 and 13.

My question is, could a blocked vent tube make the bike throw engine codes? I should mention yesterday it ran great for 30 miles, then the fuel light came on, hence getting gas this morning.
Thank you for any advice.

 

[spymac]

Same gas station on both fill-ups?

Some general troubleshooting techniques:
Try filling up at a different station.
Try filling up just a gallons and see if the issue persists.

Doesn't hurt to check the vent tube, push some air through it to make sure there are no blocks.

 

[Silverrider]

Hello all,
I have searched for this and it seems over filling the gas tank can cause some running issues.

Twice, soon after getting gas the bike has started stumbling and cutting in and out-like riding a bull sometimes.

The first time this happened, I cleared the codes to start fresh with my buelltooth(I bought the bike used 2 weeks ago).

The second time, this morning, I got gas, filled to just below the opening while on the side stand. I went on my way and about 4 miles in it started running rough.

I made it work, let it idle for a while, stopped it, started it and eventually it idled and rode normal for about a mile. I checked the codes using the jumper method and if I am reading correctly it shows code 11 and 13.

My question is, could a blocked vent tube make the bike throw engine codes? I should mention yesterday it ran great for 30 miles, then the fuel light came on, hence getting gas this morning.



Thank you for any advice.

Code 11 is Throttle Position Sensor Circuit High

Code 13 is Rear Oxygen Sensor Circuit Low/Engine Lean

 

[user_deleted]

to expound on what spymac said which is great info....remove fuel line from frame vent and see if it's clear. do NOT blow thru the line when connected to frame vent as you'll destroy the vent.
check to see that the frame vent assembly is actually working.
remove your fuel cap and check the self-contained vent. it must work to vent the frame/tank
have seen fault code #13 on several occasions following a fuel fill-up and logically could never determine why. but when your O2 sensor is on the way to death-row the symptoms you described including the fault code happen.
classic example is you fill up....run a few miles...bike will NOT respond to throttle inputs....you pull off the side of road....shut down....wait a few minutes....fire back up and it's normal again for several miles....sometimes till next fill up.
NOTE: for the hell of it carefully check both battery cable connections at their terminals for cleanliness and tightness. one or both loose causes anomalies.
i'd strongly suggest replacing the O2 sensor as it sounds lazy.
here's what crosses over:
More O2 sensors:

-GM OEM= 25162693
-NTK= 21002
-Airtex= 553071
-Bosch= 12014(wire a tad shorter than stock)
-Denso= 234-1001
-Walker= 250-21001
-SNG= SN1-15

 

[mpaternoster]

Rode home today from work, all was normal. Topped off the tank and rode a few more miles, all good as well. Being home, I plugged in m buelltooth and saw the codes above. I am running the stock tune with a K&N air filter and the race exhaust. Would that cause any issues like I have seen? Edit- I have no idea what ECM map I have because I just loaded the race map and it still says stock in ECMDroid.

Gas is all from the same station.

I had originally thought the battery was the issue. I charged that to full and checked all the connections and they looked ok.

EDIT2
Now it threw Code 33 while idling in the driveway, but drove fine for the test ride

 

[user_deleted]

EDIT2
Now it threw Code 33 while idling in the driveway, but drove fine for the test ride

that pretty much narrowed it down for you right there. pump on the way out OR chafed wires.
you never mentioned the year of your XB but 03-07 pumps had a propensity for the internal wires to rub against the bracket and short. typically pops the pump fuse....sometimes throws fault code 33. i'd still consider a new O2 sensor when you get time but sounds like you'll be googling "buell xb fuel pump replacement" and in all likelihood replacing same.
there are multiple threads on this site that not only walk you thru the replacement procedure as does the SM....but also threads on reasonably priced factory pump alternatives.

 

[mpaternoster]

Bike is a 2005. Previous owner says he never had a CEL, which I find hard to believe. I will do some research on the chafed wires topic. Thanks for your help on this. All fuses look good, I checked the vent hose and air does pass through to the tank.

 

[user_deleted]

yes sir always my pleasure. if you google the below it will walk you thru O2 sensor replacement as well as tons of fuel pump info. both can be done of course without disturbing engine placement which means no "engine rotation" required. google:

buell xb O2 sensor replacement
buell xb fuel pump substitution
buell xb fuel pump replacement

 

[Silverrider]

I am sure John has your issue correct, Have you checked your connections at the pump ? It would nice if they just need cleaning, just a thought.

 

[mpaternoster]

I have not checked any connections yet. Fuel pump behaves normally as far as I can tell.

It cycles on when I turn the key, shuts off after a few seconds. Then it runs after bike starts. Bike has always started easily so far, even when in the skip spark mode.

I got this bike 2 weeks ago and wasn't expecting all these issues yet. I will try to see what connections I need to check.

 

[Silverrider]

Welcome to owning a Buell, once you get the bugs out you will have learned a lot and have a dependable ride.

 

[mpaternoster]

I hope so, I got this to possibly replace my bandit and be more reliable than my MZ Skorpion.

Still hoping is just bad gas still in the tank from the previous owner, but with running a full tank through it already I'm not optimistic

 

[Silverrider]

Have you tried running any fuel injector cleaner ? Tips could be a little clogged, berryman chemtool, I always run it in the tank on all my bikes, just to make sure things are clean and then once a year.

 

[mpaternoster]

OK,
I reset the TPS suggested by a fiend that has a few of these.

I followed the instruction in the video. While warm, I adjusted the idle to 1050ish, TPS is at 5.1. It was idling fine, no CEL. I went to go around the corner and as I clicked into gear, the CEL came on and started running rough.

The code now is 11, TPS too low/short. I clear the code, start the bike, idles fine for a bit then the CEL and error code 11. This has happened 3 times in a row.

Also, when looking at ECMdroid, the TPS on live data screen is stuck at 12.5, it does not change, though it shows the idle changing.

Any ideas on where to look next?

 

[Chicknstripn]

Check the wiring to your TPS sensor. I believe the code is telling you there's a short in that system or from what you stated the TPS sensor is not responding.
If the TPS signal shows no change in ECMspy while turning the throttle then there is your problem.
Good luck

 

[user_deleted]

a long ago post addressing what might have happened to you via bluetooth/ecmdroid.
here:

The ECMDroid TPS Reset took me awhile to figure out. Reading on the forums I got confused and thought the channel called "TPS Voltage" was what I needed to look at for throttle plate adjustment. However, that channel read 1.19v no matter what I did with the idle screw. Twisting the throttle open increased it, IIRC, to something like 3.8v at wide open. It finally dawned on me this was the wrong channel.

Looking around, I found a different channel called "TPD" which seemed to be what is needed to reset the plate angle correctly after a TPS reset on my '03 XB9S.

Here's how I did it:

1-With key and kill button switched on, bit motor not running, connect to ECM Droid.
2-Find the Data Channel screen and select TPD Channel and RPM Channel.
3-Toggle the "Live Data On" button.
4-Back out the idle screw until the TPD channel readout drops to 0º, then back it out 2 more turns.
5-Change screens to the one with a "TPS Reset" button, and hit TPS Reset. Once it indicates TPS Reset was done successfully, hit OK.
6-Go back to the Data Channels window.
7-Turn the idle screw clockwise until it shows 5.5º to 6º in the TPD channel.
8-Start the bike. Adjust the idle screw until you get your desired idle speed (via the Data Channel not your tach).

I believe I did this all correctly. Please correct me if I got any of this wrong!

 

[mpaternoster]

The procedure above is exact how I did it and it was idling great. As soon as I clicked into gear, CEL came on and now the live data from the bueltooth shows TPD stuck on 12.5 and voltage 0.0

 

[user_deleted]

then i'd suggest not only following the advice of carlos but also: tps screws loose? there are 2. TPS sensor faulty

06 and later different unit. the rotater that houses the shaft blade configured differently.
yours will be: Autozone Duralast TPS213
about $50 less than dealer part # retail pricing.

 

[mpaternoster]

TPS screws are good, I was about to check the manual for how to test the TPS. I took the battery out, finally managed to unplug the ECM that didnt want to unplug, and reseated. The TPS is now active in ECMDroid. Good news is the bike idles and the TPS updates. Not sure how long that will last.

lunaticfringe, thank you for the part number. I will pick up when this acts up again.

 

[user_deleted]

TPS screws are good, I was about to check the manual for how to test the TPS. I took the battery out, finally managed to unplug the ECM that didnt want to unplug, and reseated. The TPS is now active in ECMDroid. Good news is the bike idles and the TPS updates. Not sure how long that will last.

lunaticfringe, thank you for the part number. I will pick up when this acts up again.

you're quite welcome and always my pleasure. the duralast # i gave you is for 2003-2005 inclusive all XB 9 and 12 models. the 2006 and later is a different rotater portion. they're easy to install if you take on the job. just be damn sure to use a quality EXACT #27 torx when removing the 4 air box base plate screws as they're factory installed with red loctite. also important is to properly reconnect the TB to airbox large rubber boot. if not properly installed and reconnected AND seated on the TB the bike runs horribly