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Buell Forum » XBoard » Archive through June 28, 2011 » Bugged out idle, choppy throttle responce « Previous Next »

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Ochoa0042
Posted on Tuesday, May 17, 2011 - 06:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've been dealing with choppy throttle responce from my bike and am not sure what can be done that could help.
I usually do not wait for the bike warm up as because im just daily commuting with my bike. So maybe the bike not warming up completely is a factor
It has a very weak idle and must be revved high from a stop. Maybe my stronger clutch boggs the bike when not under high revvs.

resetting my TPS:
I've move the idle-adjust to zero, reset, then readjusted to get a normal idle.
and now my bike does not want to idle at all..
and the throttle responce is way way off..

would it be that my tps is bad?

PS:
I've noticed the throttle body is popping, looking further, there are minor 'explosions' (for lack of a better term) within the throttle body

(Message edited by ochoa0042 on May 18, 2011)
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Ochoa0042
Posted on Wednesday, May 18, 2011 - 12:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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Arctic9r
Posted on Wednesday, May 18, 2011 - 11:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

loosen all throttle cables before performing a TPS reset, then re-adjust after TPS is reset warm. you may have throttle cable holding the plate open screwing up your TPS settings.
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Ochoa0042
Posted on Wednesday, May 18, 2011 - 05:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I talked to the dealer and they said when you do the TPSreset you should also follow with an AFC reset..
never read nor heard of this before.. AirFuelControll.. or something with the AirFuel mixture..
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Rhpaw
Posted on Thursday, May 19, 2011 - 01:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Do you have a k&n/oiled filter?
Clean your maf, it might be oily.
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Ochoa0042
Posted on Thursday, May 19, 2011 - 02:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Nope, stock air and oil filter
maf...? MassAirFlow sensor...? Where is that.. maf

(Message edited by ochoa0042 on May 19, 2011)
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Andymnelson
Posted on Thursday, May 19, 2011 - 08:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

our bikes do not have MAFs (biggest flaw in out FI systems, IMO).

I don't think it would cause your problem, but you can reset the AFV (adaptive fuel value) with ECMSpy as well. I think it's maybe even on the same screen as where you reset the tps?
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Rhpaw
Posted on Thursday, May 19, 2011 - 09:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ohh.. sorry-not MAF, MAF looking device in airbox.. airtemp sensor. I've had mine get dirty and cause the bike to get bitchy.
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Arctic9r
Posted on Thursday, May 19, 2011 - 02:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

it's AFV for "adaptive fuel value" which allows the fuel map to shift 5% varied on what the 02 sensors tell the ECM. This should always be reset when the TPS is reset.

and are you speaking a MAP sensor?
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Firemanjim
Posted on Thursday, May 19, 2011 - 03:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

TPS reset must be done with the throttle plate COMPLETELY closed,back off cable until you can actually feel the throttle plate contact bore when you close the throttle,it will almost stick,then set your TP so bike starts and idles cold. Reset idle when completely warmed up if needed..Suspect your leaving cold may have fouled plugs-might as well replace em.
And AFV reset is only needed if yours is skewed more than 5%--normal to see a range of 95-105, more than that and something is off.
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Ochoa0042
Posted on Thursday, May 19, 2011 - 10:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

did anyone watch the video? lol

ok i will check the AirTemp Sensor..
I cannot get my bike to idle anymore, even with the idle-screw all the way IN.. could it be that at the throttle end of the idle-screw had gone loose?
because I have in the past been able to raise the idle up kinda far.. no go whatsoever here now

(Message edited by ochoa0042 on May 19, 2011)
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Arctic9r
Posted on Friday, May 20, 2011 - 10:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

backing it out will close the plate. not sure exactly what you are referring to.
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Glitch
Posted on Friday, May 20, 2011 - 11:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you're talking about the idle adjust beside the air scoop...
You may want to check to make sure it's still in one piece.
You'll have to take off the whole air box to get to it.
Mine rusted inside the cable and broke, easy fix, if you can find a new one.
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Ochoa0042
Posted on Wednesday, May 25, 2011 - 11:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

it will not idle
it will not idle
it will not idle

I usually have all the answers for my bike, but this time i do not.. i've taken off the airbox and checked all i can see down there, nothing.. Im not sure WHAT TO DO!!!
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Arctic9r
Posted on Thursday, May 26, 2011 - 12:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

bring it to a pro. let a TECHNICIAN look at it.
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Iamarchangel
Posted on Sunday, May 29, 2011 - 09:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Okay, just took my bike apart for a similar problem.

Don't look for unicorns just because you see hoofprints. Sensors don't fail as often as people suggest.

On my bike, I found that the throttle body screws were not tight.

Air filter was very dirty.

Plug wire was worn right to the white showing from rubbing against the centre tie bar mount.

Any one of those would create the situation you're looking at.
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Ochoa0042
Posted on Monday, May 30, 2011 - 07:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the throttle bodie, this rings a bell alot!
how did you tighten them?
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Ochoa0042
Posted on Monday, May 30, 2011 - 09:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You know what, I had a habbit of twisting closed the throttle past the stopping point and torquing it back too.. maybe this has caused the plate to get loose, but has got me wondering.. I bet its not the full solutiion to the problem..
I'm not giving up just yet about taking it to the technician!
And I noticed that when the bike is cold it will not idle at all, and needs constant throttle at low-mid RPM. Once warmed up the bike seems to be more active and normal, but have not yet been able to adjust because I just brought it to my parents garage and eating some dinner!!!
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Iamarchangel
Posted on Monday, May 30, 2011 - 11:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

There are two bolts (1/2" head) on the left side, two allens on the right.

They're just about impossible to reach. I did it just before I rotated the engine back into place.

There's a torque setting but I don't think any wrench can fit in there to check. I made them flush and a quarter turn more.
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Ochoa0042
Posted on Sunday, June 12, 2011 - 03:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

well it seems to have fixed itself!! After a good fast ride for a couple hours on my favorite twisties
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Terrys1980
Posted on Sunday, June 12, 2011 - 04:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My bike did the same after filling up with cheap gas. It wouldn't idle sometimes and it would hesitate real bad around 4500 rpm and sometimes backfire. After I was able to put some gas from my usual ethanol free station it ran like a champ.
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