Maybe someone can help me.......... - Chicagoland Sportbikes
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post #1 of 26 (permalink) Old 06-08-2012, 10:19 PM Thread Starter
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Maybe someone can help me..........

Today at BHF while exiting T7 rolled on throttle on exit and got to WOT when the FI light came on and the bike sputtered. No power.

Back in the pits, tried disconnecting power commander, checking fuses, etc all to no avail. Basically bike is fine unless under load at WOT. where do I start?

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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post #2 of 26 (permalink) Old 06-08-2012, 10:26 PM
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My old gixxer did something similar, it was the fuel pump. Maybe swap on someone else's tank/pump for a quick test? Gotta be someone in the pits with the same bike.

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post #3 of 26 (permalink) Old 06-08-2012, 10:42 PM
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Got gas? aside from the clsb obvious ?

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post #4 of 26 (permalink) Old 06-08-2012, 10:47 PM
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Sorry to hear of this Craig - Hope she gets back up and running and at Clapped Out Status ASAMFP

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post #5 of 26 (permalink) Old 06-08-2012, 11:01 PM
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post #6 of 26 (permalink) Old 06-08-2012, 11:22 PM
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If seen this before. It's your shitter, the shitter's full. Just drop in some ball bearings and a quart of quaker state...make that prestone. And you will be right as rain.

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post #7 of 26 (permalink) Old 06-09-2012, 12:18 AM

 
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Quote:
Originally Posted by Kegger View Post
Today at BHF while exiting T7 rolled on throttle on exit and got to WOT when the FI light came on and the bike sputtered. No power.

Back in the pits, tried disconnecting power commander, checking fuses, etc all to no avail. Basically bike is fine unless under load at WOT. where do I start?
I know this guy that runs Turnoneracing....just saying....

CCS race official
sold the track bike
too slow to ride

"Repairs end December 31. 2011."

OK, it was a tough day.....back open again!!!
Bring me your broken down machines.

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post #8 of 26 (permalink) Old 06-09-2012, 07:00 AM
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Light still on, get code?

Im not male sure the secondary butter fly are moving as that is a common problem as I think you have an 04-05 GSXR 600

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post #9 of 26 (permalink) Old 06-09-2012, 07:04 AM
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I could be the butterflies if you have that vintage, wire them open

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post #10 of 26 (permalink) Old 06-09-2012, 07:18 AM
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Quote:
Originally Posted by JRSMAIL View Post
Im not male ...
this just disturbed me...

is it happening anywhere else or just out of 7? mabye something moves in the bike....

Did the light come one and than the light? or the other way? I know its hard to say....
if the bike bogged before the light came on, I'd check the fuel supply, if the light came one and than the bike bogged... it is most likely a sensor fault that causes the ECU to switch to the emergency mode.

Did you checked your spark plugs lately?

#19
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post #11 of 26 (permalink) Old 06-09-2012, 08:07 AM
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Just skip turn 7. Problem solved.
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post #12 of 26 (permalink) Old 06-09-2012, 08:17 AM
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Jon's got it ..... Check the butterfly servos.

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post #13 of 26 (permalink) Old 06-09-2012, 09:50 AM
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Quote:
Originally Posted by Chicago Performance View Post
Just skip turn 7. Problem solved.
OR he needs a 1/4 turn throttle...

#19
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post #14 of 26 (permalink) Old 06-09-2012, 11:40 AM
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pull the FI code, it'll tell you exactly what's wrong if you have an iphone the app Motorcycle Medic gives you instructions and a description of all the codes for your reference.

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post #15 of 26 (permalink) Old 06-09-2012, 01:55 PM Thread Starter
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Quote:
Originally Posted by JRSMAIL View Post
Light still on, get code?

Im not male sure the secondary butter fly are moving as that is a common problem as I think you have an 04-05 GSXR 600
Thanks! Yeah, a description of the bike would help!Indeed its an 05 GSXR 600

Quote:
Originally Posted by Germany View Post

is it happening anywhere else or just out of 7? mabye something moves in the bike....

Did the light come one and than the light? or the other way? I know its hard to say....
if the bike bogged before the light came on, I'd check the fuel supply, if the light came one and than the bike bogged... it is most likely a sensor fault that causes the ECU to switch to the emergency mode.

Did you checked your spark plugs lately?
Stefan, happens everywhere, just happened to start doing it at turn 7 exit. Dont know which came first the chicken or the egg, at the time I was looking down the straight exiting T7.

Quote:
Originally Posted by eE jeremy View Post
pull the FI code, it'll tell you exactly what's wrong if you have an iphone the app Motorcycle Medic gives you instructions and a description of all the codes for your reference.
Ill look for that.............

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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post #16 of 26 (permalink) Old 06-09-2012, 01:56 PM Thread Starter
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Quote:
Originally Posted by JRSMAIL View Post
Im not male sure the secondary butter fly are moving as that is a common problem as I think you have an 04-05 GSXR 600
Quote:
Originally Posted by Vcook View Post
I could be the butterflies if you have that vintage, wire them open
Quote:
Originally Posted by BLARNEY View Post
Jon's got it ..... Check the butterfly servos.

Tom
So if thats the issue, wire them open and call it a day?

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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post #17 of 26 (permalink) Old 06-09-2012, 04:29 PM
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Yes .... Although I think there is a small mod to keep from pissing off the ecu.

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post #18 of 26 (permalink) Old 06-09-2012, 06:05 PM
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Quote:
Originally Posted by Kegger View Post
So if thats the issue, wire them open and call it a day?
Prop tank open, take cover off air box. Start bike and rev. There are two butter fly valves. One operated by your hand turning the throttle, thus opening the lower one. The upper or top ones if you well are operated by a servo motor. If they are not moving by snapping rev's close to full sign the servo is bad and you can not get just the servo. It is the whole FI rail they sell you to fix the $30 problem. People have and can repair it but good luck..

Wiring open is one way to fixing and you will have a low to mid range bog if you will, thus need to keep motor in upper revs to avoid that is if it is the problem...

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post #19 of 26 (permalink) Old 06-09-2012, 07:10 PM
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Quote:
Originally Posted by JRSMAIL View Post
Prop tank open, take cover off air box. Start bike and rev. There are two butter fly valves. One operated by your hand turning the throttle, thus opening the lower one. The upper or top ones if you well are operated by a servo motor. If they are not moving by snapping rev's close to full sign the servo is bad and you can not get just the servo. It is the whole FI rail they sell you to fix the $30 problem. People have and can repair it but good luck..

Wiring open is one way to fixing and you will have a low to mid range bog if you will, thus need to keep motor in upper revs to avoid that is if it is the problem...
If the secondary throttle butterflies are the problem, unplug the servo (right side of throttle body and manually open the butterflies all the way. Leave the position sensor connected. The bike will run, with the already mentioned low end power loss.

I've fixed the STVA, as have others here. It's not something you likely have parts / tools for at the track.

Craig
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post #20 of 26 (permalink) Old 06-09-2012, 07:58 PM
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Or just unscrew the butterflies from the rail and remove them.
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post #21 of 26 (permalink) Old 06-09-2012, 09:15 PM
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post #22 of 26 (permalink) Old 06-09-2012, 09:28 PM Thread Starter
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So, it throws a "C28" code which is "secondary throttle motor"

Causes

Faulty secondary throttle motor/actuator

loose or poor contacts on secondary throttle motor connector

wiring fault(open or shorted circuit)




Where is this "secondary throttle motor connector" ?

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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post #23 of 26 (permalink) Old 06-09-2012, 09:29 PM Thread Starter
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Quote:
Originally Posted by beac83 View Post
If the secondary throttle butterflies are the problem, unplug the servo (right side of throttle body and manually open the butterflies all the way. Leave the position sensor connected. The bike will run, with the already mentioned low end power loss.

I've fixed the STVA, as have others here. It's not something you likely have parts / tools for at the track.
How do I fix it, (not at the track)?

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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post #24 of 26 (permalink) Old 06-09-2012, 09:33 PM
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The secondary throttle servo is behind the frame spar by your right knee.

Just at the back of the tank.

The connector come off the servo motor.

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post #25 of 26 (permalink) Old 06-09-2012, 09:34 PM
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If they are the same as the 06-07 throttle bodies, I have a set off my bike you can swap to see if that's the issue.

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post #26 of 26 (permalink) Old 06-09-2012, 11:22 PM Thread Starter
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Definitly the butterflys.......wired em open. Thank you all!
Attached Images
File Type: jpg butterflys.jpg (63.0 KB, 14 views)

"When in doubt, use full throttle. It may not improve your situation, but it will end the suspense."
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