Sorry for posting something which has been flogged to death in here....

long story short.... I have a C28 error - I have no manual - the link to the C28 fix thread linked from the FI codes sticky has had the uploaded manual pics posted by "somejeffguy" cleared down ....all I get is red X's http://www.gixxer.com/forums/images/graemlins/frown.gif

Could someone help me out by posting em up in here. It would be mucho appreciated.

No problem bro...

C28 is the STV actuator... secondary throttle body.

First thing to check - the two cables connecting the secondary butterflies to the actuator itself. Looking for broken or frayed cables. If they look OK, check the electrical connections to and from the STV actuator for visible problems.

If everything looks fine - then you can try adjusting them. Post back if needed & I'll go through the process.

BTW - is it an intermittent error. Or has it come on and stayed on?

You can ride like this - your power will just be down.

cheers lean http://www.gixxer.com/forums/images/graemlins/cheers.gif

The FI warning light just came on when I started the bike up on tuesday morning, and its stayed on ever since.

I put it into dealer mode and got -coo. if I run the engine and go into dealer mode I get c28.

There is no real noticable decline in power. The only thing I did notice is that at the weekend (before I got the fuel injection warning light coming on)....I was going a long distance on the motorway (280 miles or so) and after long stints at 120mph or so on constant throttle when ever I pulled in to get fuel the tickover was real high...like 5K or so and it wouldn't go down. Then it just stopped happening dropped back to normal and its been fine since....

Kinda sounds like a frayed cable then maybe http://www.gixxer.com/forums/images/graemlins/dunno.gif

i''l get the tank off tonight and have a proper look.

Probably a cable or an adjustment. The '00s came with cables that didn't include a plastic sheath that protected the business end of the cables. As a result, they frayed easily. I'm pretty sure the '01s came from the factory with the new protected cables, but given enough time, they can go bad as well.

Or - it might just call for an adjustment. Real easy. Like I said - I'll describe the procedure if needed.

Or it could even be caused by something interfering with the movement of the cables. Check around the cables to make sure nothing's interfering with their movement or binding them up in any way.

The only thing that confuses me is that you say you get no error code (C00) unless the bike's running? The thing is - usually the C28 error will show up before starting the bike, as long as the key is on and the starter button is on, right after the STV actuator goes through it's little self test of fully opening and closing it's butterfiles. But I don't think that the STV actuator goes through this test unless the bike's in nuetral. So try this - don't start the bike, but make sure you hear it go through it's self test - have the bike in nuetral, the start switch on, and turn the ignition switch to 'ON'. After it goes through the self-test, it should show the FI light, and if you then switch into dealer mode, you should get the C28 error code.

If not - if it really only shows up when the bike is running - it could be something a little more difficult to detect. I've noticed that there seems to be a correlation between charging system problems and unexplained C28s. But this is an unlikely scenario.

RepulsioN said:

Sorry for posting something which has been flogged to death in here....

long story short.... I have a C28 error - I have no manual - the link to the C28 fix thread linked from the FI codes sticky has had the uploaded manual pics posted by "somejeffguy" cleared down ....all I get is red X's http://www.gixxer.com/forums/images/graemlins/frown.gif

Could someone help me out by posting em up in here. It would be mucho appreciated.



here
http://www.sullivantransmission.com/images/DOCUMENT_GALLERY_PICS/merge.jpg

LeanAngle said:

The only thing that confuses me is that you say you get no error code (C00) unless the bike's running? The thing is - usually the C28 error will show up before starting the bike, as long as the key is on and the starter button is on, right after the STV actuator goes through it's little self test of fully opening and closing it's butterfiles. But I don't think that the STV actuator goes through this test unless the bike's in nuetral. So try this - don't start the bike, but make sure you hear it go through it's self test - have the bike in nuetral, the start switch on, and turn the ignition switch to 'ON'. After it goes through the self-test, it should show the FI light, and if you then switch into dealer mode, you should get the C28 error code.




tried that and your right it did give the c28 error.

lifted the tank and sure enough I have a frayed No.2 cable.

Just ordered both cables for prosperity - they should arrive tommorrow. http://www.gixxer.com/forums/images/graemlins/banana.gif

Are they a twat to fit? Anything I need to be particularly aware of?

sullytrnygsxr02750 said:

here
http://www.sullivantransmission.com/images/DOCUMENT_GALLERY_PICS/merge.jpg



http://www.gixxer.com/forums/images/graemlins/cheers.gif http://www.gixxer.com/forums/images/graemlins/thumb.gif

Sully's gotcha covered (you're a good man, Sully) http://www.gixxer.com/forums/images/graemlins/thumb.gif

Sully - do you happen to have the following page or two that shows how to switch out the cables? It's difficult if not impossible to replace the cables without either following the book's instructions, or simply unbolting the STV actuator temporarily from the bracket that it's mounted to in order to get enough slack to install the cables.

I am getting a C28 error also, and i just did the PAIR mod, could this have anything to do with the PAIR mod? The bike wont accelerate over 5-6 RPM. I checked my install, and one of the hoses where the old valve slipped off alittle bit, i havent ridden bike yet, i just fixed the slipped hose, do you think this was my problem?? http://www.gixxer.com/forums/images/graemlins/wtf.gif

jut8 said:

I am getting a C28 error also, and i just did the PAIR mod, could this have anything to do with the PAIR mod? The bike wont accelerate over 5-6 RPM.



What did you do with the vacuum line that comes off of the #4 TB when you did the PAIR mod? Is it capped or connected to something. If not, the vacuum leak might cause problems, though I can't be sure if it would cause the problem you're describing.

Other than that, there's nothing else the PAIR mod would do, whether done correctly or not, that cause that kind of behavior, or cause a C28, unless you're somehow interfering with the movement/operation of the cables/butterflies.

If your problem (not revving over 5-6K) were to be caused by the C28, then it would be because the butterflies were staying closed up pretty tightly. I suppose this could happen if they were in the closed position, or near it, when the STV actuator was disconnected from the wiring harness. Or if one of the cables snapped at the appropriate time.

Get in there and do a visual - checking your electrical connections, etc. pull the airbox and watch turn on the ignition with the bike in nuetral (as described above) and watch the throttle bodies as the STV goes through it's self-test of fully opening & closing the butterflies. Hopefully you'll figure out what's wrong from there.

And look at the link Sully posted.

LeanAngle said:

Sully's gotcha covered (you're a good man, Sully) http://www.gixxer.com/forums/images/graemlins/thumb.gif

Sully - do you happen to have the following page or two that shows how to switch out the cables? It's difficult if not impossible to replace the cables without either following the book's instructions, or simply unbolting the STV actuator temporarily from the bracket that it's mounted to in order to get enough slack to install the cables.

the book has it as puting the cables on with the tb removed from the, and it looks japishhttp://www.gixxer.com/uploads/STV_DIAGRAM_EX.jpg

LeanAngle said:

Probably a cable or an adjustment. The '00s came with cables that didn't include a plastic sheath that protected the business end of the cables. As a result, they frayed easily. I'm pretty sure the '01s came from the factory with the new protected cables, but given enough time, they can go bad as well.

Or - it might just call for an adjustment. Real easy. Like I said - I'll describe the procedure if needed.

Or it could even be caused by something interfering with the movement of the cables. Check around the cables to make sure nothing's interfering with their movement or binding them up in any way.

The only thing that confuses me is that you say you get no error code (C00) unless the bike's running? The thing is - usually the C28 error will show up before starting the bike, as long as the key is on and the starter button is on, right after the STV actuator goes through it's little self test of fully opening and closing it's butterfiles. But I don't think that the STV actuator goes through this test unless the bike's in nuetral. So try this - don't start the bike, but make sure you hear it go through it's self test - have the bike in nuetral, the start switch on, and turn the ignition switch to 'ON'. After it goes through the self-test, it should show the FI light, and if you then switch into dealer mode, you should get the C28 error code.

If not - if it really only shows up when the bike is running - it could be something a little more difficult to detect. I've noticed that there seems to be a correlation between charging system problems and unexplained C28s. But this is an unlikely scenario.




You're right about the 2000's and the cables.....one of mine frayed and broke.

1quickgixxer said:


LeanAngle said:

Probably a cable or an adjustment. The '00s came with cables that didn't include a plastic sheath that protected the business end of the cables. As a result, they frayed easily. I'm pretty sure the '01s came from the factory with the new protected cables, but given enough time, they can go bad as well.

Or - it might just call for an adjustment. Real easy. Like I said - I'll describe the procedure if needed.

Or it could even be caused by something interfering with the movement of the cables. Check around the cables to make sure nothing's interfering with their movement or binding them up in any way.

The only thing that confuses me is that you say you get no error code (C00) unless the bike's running? The thing is - usually the C28 error will show up before starting the bike, as long as the key is on and the starter button is on, right after the STV actuator goes through it's little self test of fully opening and closing it's butterfiles. But I don't think that the STV actuator goes through this test unless the bike's in nuetral. So try this - don't start the bike, but make sure you hear it go through it's self test - have the bike in nuetral, the start switch on, and turn the ignition switch to 'ON'. After it goes through the self-test, it should show the FI light, and if you then switch into dealer mode, you should get the C28 error code.

If not - if it really only shows up when the bike is running - it could be something a little more difficult to detect. I've noticed that there seems to be a correlation between charging system problems and unexplained C28s. But this is an unlikely scenario.




You're right about the 2000's and the cables.....one of mine frayed and broke.



what happen with your cooling prob

sullytrnygsxr02750 said:


LeanAngle said:

Sully's gotcha covered (you're a good man, Sully) http://www.gixxer.com/forums/images/graemlins/thumb.gif

Sully - do you happen to have the following page or two that shows how to switch out the cables? It's difficult if not impossible to replace the cables without either following the book's instructions, or simply unbolting the STV actuator temporarily from the bracket that it's mounted to in order to get enough slack to install the cables.

the book has it as puting the cables on with the tb removed from the, and it looks japishhttp://www.gixxer.com/uploads/STV_DIAGRAM_EX.jpg




cheers lads http://www.gixxer.com/forums/images/graemlins/thumb.gif http://www.gixxer.com/forums/images/graemlins/thumb.gif

Right cables came this morning so I'll print this off and have a go at at fitting them tonight.

sullytrnygsxr02750 said:


1quickgixxer said:


LeanAngle said:

Probably a cable or an adjustment. The '00s came with cables that didn't include a plastic sheath that protected the business end of the cables. As a result, they frayed easily. I'm pretty sure the '01s came from the factory with the new protected cables, but given enough time, they can go bad as well.

Or - it might just call for an adjustment. Real easy. Like I said - I'll describe the procedure if needed.

Or it could even be caused by something interfering with the movement of the cables. Check around the cables to make sure nothing's interfering with their movement or binding them up in any way.

The only thing that confuses me is that you say you get no error code (C00) unless the bike's running? The thing is - usually the C28 error will show up before starting the bike, as long as the key is on and the starter button is on, right after the STV actuator goes through it's little self test of fully opening and closing it's butterfiles. But I don't think that the STV actuator goes through this test unless the bike's in nuetral. So try this - don't start the bike, but make sure you hear it go through it's self test - have the bike in nuetral, the start switch on, and turn the ignition switch to 'ON'. After it goes through the self-test, it should show the FI light, and if you then switch into dealer mode, you should get the C28 error code.

If not - if it really only shows up when the bike is running - it could be something a little more difficult to detect. I've noticed that there seems to be a correlation between charging system problems and unexplained C28s. But this is an unlikely scenario.




You're right about the 2000's and the cables.....one of mine frayed and broke.



what happen with your cooling prob




I put in my new thermostat today and got a new rad cap as well.....I should have it back together tonight and will let you know.....thanks for the help http://www.gixxer.com/forums/images/graemlins/thumb.gif

I looked in the service manual and saw where the STV is suppose to be. The service manual doesnt make much of a reference to the actual cables, could anyone let me know which of all the cables(colors for an 00 750 or how many cables there are) under the tank am I suppose to check? Should i completely remove the tank or just pry it up? updated pics would help.

Thanks

holy old thread, batman.

the cables being referred to here aren't electrical cables, they're like short throttle cables that connect the secondary throttle valve actuator to the secondary throttle butterflies. lift up the tank and look at the right side of the throttle bodies, you can't miss them. unless yours are gone. only the '00-01 750's used cables for stv actuation.

the following scan is from the service manual:

http://www.gixxer.com/uploads/473.jpg

Okie, I am getting a C28 Error as well. I've not even taken a look at the cables yet, but after 14k miles I'm sure that's the problem from the sounds of what i read around this thread. If this is indeed my problem, My question is Will the Sheathed 2001/750 STVA cables fit on the 2000/750?

LeanAngle, could you please post the adjusting procedure for me and those who could benifit from it? Thanks

My upper #2 cable was indeed frayed. I ordered both #1 and #2 to replace them both just for good measure.

alstair said:
LeanAngle, could you please post the adjusting procedure for me and those who could benifit from it? Thanks



the cable adjustment is only for the 00-01 750's, because they're the only ones that use cables.

LeanAngle said:

jut8 said:

I am getting a C28 error also, and i just did the PAIR mod, could this have anything to do with the PAIR mod? The bike wont accelerate over 5-6 RPM.



What did you do with the vacuum line that comes off of the #4 TB when you did the PAIR mod? Is it capped or connected to something. If not, the vacuum leak might cause problems, though I can't be sure if it would cause the problem you're describing.

Other than that, there's nothing else the PAIR mod would do, whether done correctly or not, that cause that kind of behavior, or cause a C28, unless you're somehow interfering with the movement/operation of the cables/butterflies.

If your problem (not revving over 5-6K) were to be caused by the C28, then it would be because the butterflies were staying closed up pretty tightly. I suppose this could happen if they were in the closed position, or near it, when the STV actuator was disconnected from the wiring harness. Or if one of the cables snapped at the appropriate time.

Get in there and do a visual - checking your electrical connections, etc. pull the airbox and watch turn on the ignition with the bike in nuetral (as described above) and watch the throttle bodies as the STV goes through it's self-test of fully opening & closing the butterflies. Hopefully you'll figure out what's wrong from there.

And look at the link Sully posted.





hi there , i have a c28 problem here too.
anyway to solve the problem?
mine is a intermittent one,i see that usually after i rev the bike then it will show
how shld i deal with it?mine is a 00 model
btw anyone has got the service manual? http://www.gixxer.com/forums/images/graemlins/smirk.gif

smokingjoe said:

LeanAngle said:

jut8 said:

I am getting a C28 error also, and i just did the PAIR mod, could this have anything to do with the PAIR mod? The bike wont accelerate over 5-6 RPM.



What did you do with the vacuum line that comes off of the #4 TB when you did the PAIR mod? Is it capped or connected to something. If not, the vacuum leak might cause problems, though I can't be sure if it would cause the problem you're describing.

Other than that, there's nothing else the PAIR mod would do, whether done correctly or not, that cause that kind of behavior, or cause a C28, unless you're somehow interfering with the movement/operation of the cables/butterflies.

If your problem (not revving over 5-6K) were to be caused by the C28, then it would be because the butterflies were staying closed up pretty tightly. I suppose this could happen if they were in the closed position, or near it, when the STV actuator was disconnected from the wiring harness. Or if one of the cables snapped at the appropriate time.

Get in there and do a visual - checking your electrical connections, etc. pull the airbox and watch turn on the ignition with the bike in nuetral (as described above) and watch the throttle bodies as the STV goes through it's self-test of fully opening & closing the butterflies. Hopefully you'll figure out what's wrong from there.

And look at the link Sully posted.





hi there , i have a c28 problem here too.
anyway to solve the problem?
mine is a intermittent one,i see that usually after i rev the bike then it will show
how shld i deal with it?mine is a 00 model
btw anyone has got the service manual? http://www.gixxer.com/forums/images/graemlins/smirk.gif



anyone here can help me out? thks

i get this alarm it is a intermittent error. what do i adjust and how ? its only come on a few times and gone away. help a brother out. could the tre cause this?