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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through October 30, 2010 » What area to tune to fix this? « Previous Next »

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Bigblock352
Posted on Thursday, October 21, 2010 - 10:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

'08 1125r D&D pipe when idling after worm up the rpm's bounce from normal idle 1400 ish to a little below 1000, sounds like its going to stall, then bounce back up to 1400 again. I have made a few changed using tunerpro but nothing has corrected this.
I can post a video if needed.
HELP!!!
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Curve_carver
Posted on Thursday, October 21, 2010 - 11:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I would reload your stock calibration. Sounds like you have issues somewhere else.I would check the hose going to your intake box.
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Hootowl
Posted on Thursday, October 21, 2010 - 11:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Idle control motor?
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Bigblock352
Posted on Thursday, October 21, 2010 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

it does it with the stock maps and all too.
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Bigblock352
Posted on Thursday, October 21, 2010 - 05:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I will check the hose
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Dannybuell
Posted on Thursday, October 21, 2010 - 05:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

IDK anything but I tend to start simple first.
1. Do you trust your gas station?
2. How many miles are on the bike?
3. Has it ever been down? damages?
4. How many gas tanks a month lately?
5. Does it run OK other than that?

I would be inclined to think sensors that can have some effect on idle speed.

(Message edited by dannybuell on October 21, 2010)
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Curve_carver
Posted on Thursday, October 21, 2010 - 11:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I was going to say look at the IAC motor but first take a look at the hose. Make sure your tps is reset as well.
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Easyrider
Posted on Thursday, October 21, 2010 - 11:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It can also happen when wrong code is burned in the ECM, only by swapping the ECM for other ECM will show you where the problem begins in the Bike or in the ECM
(-:
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D_adams
Posted on Friday, October 22, 2010 - 01:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you still have the stock muffler, swap back to that first. That would be the easiest mechanical change and will show if it's the ecm or the pipe causing the problem, assuming you haven't muddled up the ecm too much.
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Bigblock352
Posted on Friday, October 22, 2010 - 12:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hose is good.
I put the stock pipe back on and it DOESN'T do it with stock exhaust.
I swapped back to the D&D and a stock map it started again, but I have notice it starts doing it at idle when the temp reaches 181. Ride it temp cools down, hit a stop light and everytime it hits 181 it starts idling poor again. I dont see anything that shows a 181 temp in the maps and all, the only thing I can even find on temp is for warmup.
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Bigblock352
Posted on Friday, October 22, 2010 - 12:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oh and never been down, 5800 miles on it, multiple tanks of gas from multiple stations in the area. I ride her every day to work so she gets a minimum of 25 miles a day. Other than idle she's a beast, runs pretty awesome.
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Nivek
Posted on Friday, October 22, 2010 - 12:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

There is programming to take the temp into consideration. That along with air pressure results in a percentage. what i mean by this is your rpm and tps will give you a chart of what the fueling map should be. . the computer will also read the temp sensor and depending on its position will tell the computer to fuel .5% or -.5 (which is defuel) or what ever number it corresponds to against what the fuel mapping says.

I remember seeing it when people where going over another program that hacked to stock ecu. .

if the bike thinks its 180 degrees then the air is less dense therefore less fuel is requires, that could possibly be why it defuels to a point of almost stalling.

My bikes current ideals at 1100-1200 pretty steadily all year long. .
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Bigblock352
Posted on Monday, October 25, 2010 - 03:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

there is programming to take temp into consideration yet, but something that triggers at 181 on the dot?

"if the bike thinks its 180 degrees then the air is less dense therefore less fuel is requires, that could possibly be why it defuels to a point of almost stalling."

I am talking coolant temp not air temp.
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