Error Code C28

[Proteous]

Well i can confirm with zero doubt that my STVA sensor had died. The measurments between open and closed were in the 10s not the 1000s and that is like miles out.
Mine started as a slow death process with the odd FI light now and again until eventually complete failiure whcih meant the bike was unrideable.

I purchased new K1 Bodies and just swapped the sensor, all fixed... While there gave her a bit of a service, new plugs, ballenced boddies and just generally cleaned shit up.

[Mick_J]

Good stuff 

[bigian14]

Right chaps, just took off seat and tank in preparation to change throttle bodies and just found out I'm a complete numpty..........
On closer inspection and checking secondary throttle (choke) shaft I noticed that it wouldn't turn very far before one of the adjuster screws fouled on one of the pod filter jubilee clips, (thread f***ed on original clamp hence why using jubilee clip).
Hopefully by slight adjustment of said clip all will be resolved quickly.
If that's the case then there will be a good set of used K7 throttle bodies going for a sensible price if anyone's interested

[Proteous]

Now if you had read my previous thread about this you would have known to check for that in the first place.. 

[bigian14]

Now if you had read my previous thread about this you would have known to check for that in the first place.. 

Yeah yeah I know LOL
I checked movement previously with tank on so couldn't see screw hitting clip and wasn't exactly sure how much rotation there should be.
Oh well, a lesson learned and experience gained 

[Mick_J]

Isn't it odd that experience never comes cheap 

[Blubber]

Now if you had read my previous thread about this you would have known to check for that in the first place.. 

Yeah yeah I know LOL
I checked movement previously with tank on so couldn't see screw hitting clip and wasn't exactly sure how much rotation there should be.
Oh well, a lesson learned and experience gained 

You 2 can get matching T/shirts made:  "been there , done that " 


thanks for sharing. It will help people.

[INSTG8R]

Ive got a STPS issue as well. 

Here is part of the conversation with the mechanic.

"I have removed your secondary plates but the shaft has to stay. Yours goes through all the right motions, doesn't get stuck
The mechanic has replaced the STPS and the STVA even though my old ones tested ok. Also tried with butterfly paddles removed, no difference.
I have have even removed the plenum to take it back to a STD bike and still have the error, Checked the side stand switch, check valve added, wiring harness checked, changed out throttle bodies with a different motor. I'm trying the same guy to see if i can get a complete ecu and dash setup to try. We have tested the wiring, The pins at the ECU, even replaced a set of throttle bodies with all the sensors from a running bike with out the issue, tested the resistance of your secondary motor through its cycle and it tests ok.
we have tested the wiring, ecu and the STVA, every things seems to work and is adjusted as per the factory specs. it just as soon as the stva operates we get the error,"

Sent ECU to Holland for fault diagnosis, repair and tested ok.

Everything operates as it should. STVA actuates at start up and moves as engine warms up but the STPS still throws up an error code.

He has run out of things to test.

Any thoughts @alfadave ?  He even disconnected the Supercharger and set back to standard. It's only been 5 months off the road 

[Proteous]

If everything tests out OK and even known working parts are throwing up the error then it can only be a wiring issue or a corroded plug issue (those plugs are crap). According to what you have said, you have litterally elliminated EVERY issue that could be causing it. But i am not convinced its not a wiring issue.
One question, do you have a Power Commander fitted or something similar as i am told these can cause the ECU to throw these errors. 

[INSTG8R]

Yes @Proteous, I have a PC3 USB fitted and the dyno guy is absolutely stumped as to why the fault keeps showing up.

[Proteous]

Does it show up when its unplugged?

[INSTG8R]

Not Sure.  I have suggested to the mechanic to test the PC although I would have expected him to eliminate that as a cause after having the bike for 5 months.

He has put the bike back to standard to see if the fault would go away but it hasn't.

The only thing left, that he cant put back to standard, is the Intake air temp sensor that screws into the right side of the air box.

Thats because the standard plastic air box has been removed and replaced with a custom aluminium one.

The intake air temp sensor now is screwed into a separate aluminium box containing a boost sensor, which is connected to the vacuum line and dump valve.

I should find out tomorrow if the pc or Air temp sensor are faulty.

It's a real brain teaser!

[Proteous]

Bump.. Any outcome on this?

[INSTG8R]

The Good news is they found a broken wire in the harness between the Intake Air temp sensor and the map sensor. No more FI fault codes. Yippee!

The bad news is it looks like my PC3 is stuffed. Every time you turn the key off then restart the bike the fuel is too rich down low. Under 2500 rpm.

Doesn't matter how many times he leans it off then re-tunes, it keeps going rich after turning the ignition off.

On advice from Dave Gamlin I'm on the hunt for a PC V for a GSF 1250F 2010 model.

Hopefully that will sort all my ails out.

So if anybody has a PC V for the above mentioned Bandit and would like to part with it, I'm in the market. lol.

[KiwiCol]

They've done a PC v for the 14 now & auto tune module.