Bike is misfiring after wheelie? - 600RR.net
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post #1 of 17 (permalink) Old 04-17-2017, 07:14 PM Thread Starter
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Bike is misfiring after wheelie?

Hi Everyone... hopefully someone can help me narrow this down.

I did a lot to my bike over the winter.. here's the list of mods/maintenance that I did.

PCV
Auto Tune
Quick shifter
Arrow headers
Servo Delete
PAIR Block
R6 throttle (I had to adjust slack at throttle bodies)

Replaced spark plugs
Replaced coolant


Okay... so it's happened twice now. Once I was on a group ride and I kept chopping the throttle and going on (live I've done before without issue) just being an idiot and the bike started misfiring, started sounding very weird like a growl sound out of the exhaust and obvious I lost about half my power.

After about 60 seconds it went away though and didn't do it again.

Now fast forward to today I was riding home and popped a tiny 4 inch wheelie in first gear by chopping the throttle. It brought the wheel up and I landed shortly after then about 2 seconds after it started misfiring again.. luckily I was about 5 minutes from home so I rode it home and it still was doing it even at idle in the drive way. When I turned the bike off and waited about 1 minute and turned it back on it was running fine again...

I don't get it.. any ideas? I'm guessing it has something from me replacing the spark plugs? I put stock NGK ones in it and checked the gap... It's weird how this only happens when I mess with the throttle. Like chopping it on that wheelie or when I was opening and closing it a lot.

Edit: I also have had my bike in my difference scenarios like it running hot in traffic or going 150+ on highway and it never did it during those times

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-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off

Last edited by hero danny; 04-17-2017 at 08:34 PM.
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post #2 of 17 (permalink) Old 04-18-2017, 11:28 AM
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If you had very low fuel it could have happened that you starved the bike while popping that weelie... then you came down... fuel took 60s to fill the system again...

It's a maybe... but nothing good came out of a wheelie, ever...

(except if you were Evil Kanievel)



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post #3 of 17 (permalink) Old 04-18-2017, 11:57 AM
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my guess is the PCV or the mapping. you can test it by just unplugging it entirely from the system.
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post #4 of 17 (permalink) Old 04-18-2017, 02:35 PM
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Bypass the bank angle sensor and try to replicate the issue.


Connect the outside two wires in the connector. You can do it temporarily with a paper clip and some electrical tape
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post #5 of 17 (permalink) Old 04-18-2017, 04:42 PM Thread Starter
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I really appreciate all of you taking the time to help me out. Thank you.

Quote:
Originally Posted by Soponcio Virtual View Post
If you had very low fuel it could have happened that you starved the bike while popping that weelie... then you came down... fuel took 60s to fill the system again...
I had plenty of fuel so I really doubt that was it... again this was like a 3 inch wheelie. Last year I was doing 1 foot high wheelies pretty consistently and it never did this to me.

Quote:
Originally Posted by trachito View Post
my guess is the PCV or the mapping. you can test it by just unplugging it entirely from the system.
You don't think it could be my spark plug wires? My friend said that sometimes when you unclip them if you do it wrong you can slightly damage the clip and it will arch out every now and then. I did replace the plugs but don't remember ever having an issue with the clips.

Quote:
Originally Posted by wibbly View Post
Bypass the bank angle sensor and try to replicate the issue.


Connect the outside two wires in the connector. You can do it temporarily with a paper clip and some electrical tape
permission to wheelie? :)

Wouldn't the bank angle sensor shut down all cylinders? Not just 1-2? Btw there were no FI lights or anything like that during these times of misfiring.

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Mod List
-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #6 of 17 (permalink) Old 04-18-2017, 05:34 PM
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Instead of questioning everything and doing nothing, try doing something. It's amazing what you can accomplish when you actually do things. It will cost you about 2mins of work to do it.


Did you have your throttle bodies off when you did the r6 tube? Are they seated properly?

Is the 6 wire connector for the ignition coils properly secured? Did you unplug it?




It could be a lot of very easy to check things, so it stands to reason that one should check them instead of making assumptions.



Ultimately you will be solving the problem, not anyone here
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post #7 of 17 (permalink) Old 04-18-2017, 05:35 PM
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Probably worth unplugging the quick shifter as well.
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post #8 of 17 (permalink) Old 04-18-2017, 09:45 PM Thread Starter
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Quote:
Originally Posted by wibbly View Post
Instead of questioning everything and doing nothing, try doing something. It's amazing what you can accomplish when you actually do things. It will cost you about 2mins of work to do it.


Did you have your throttle bodies off when you did the r6 tube? Are they seated properly?

Is the 6 wire connector for the ignition coils properly secured? Did you unplug it?




It could be a lot of very easy to check things, so it stands to reason that one should check them instead of making assumptions.



Ultimately you will be solving the problem, not anyone here

Yeah, I had to work late and couldn't ride today... i'll try tomorrow to replicate the issue. I appreciate all your help Wibbly.

I didn't have the throttle bodies off, I just adjusted the slack with them on. I did have to unplug the ignition wires. I think i'll start with that. Once I replicate the issue I will go ahead and remove the tank fairing (dreading that!) and then give it a try again. I will make sure I post up what I find.

Thanks again for your help, i'm sure you know the feeling when something isn't working, kinda makes you feel sick inside lol

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Mod List
-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #9 of 17 (permalink) Old 04-18-2017, 10:20 PM
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you can bypass the bank angle sensor very easily, you just need to pull the small plastic insert from the left side of the front. the plug for the BAS sits behind it. will take you about 2 mins. (you can remove this piece by popping the side panel out of the tank cover, removing the bolt, and the trim clip from the inside, then working it out. it's pretty simple.


the plug for the coils you should be able to reach without removing anything. two of the coils are fed 12v from one wire, and the other two are fed from another. these two positives are actually from the same line, they split off in a splice hidden in the harness where the positive also takes off for the bank angle sensor. the plug has 6 wires in it, the two positives, and the four individual negatives that go to the ecu to be switched to ground to generate a spark.


if you didn't have the TBs off then nevermind, if your TBs aren't properly seated you can get all kinds of weird bucking and surging, thought maybe an errant wheelie dislodged them (i've seen it before). it's basically just an enormous vacuum leak.



those two checks should take you about 10 mins. no big deal
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post #10 of 17 (permalink) Old 04-19-2017, 02:07 PM
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i strongly doubt it's the BAS. it's job is to turn off the fuel pump when triggered which would shut off all the cylinders. or does it shut off the spark on this bike? on my 1krr, it shuts off the fuel delivery.

Last edited by trachito; 04-19-2017 at 02:16 PM.
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post #11 of 17 (permalink) Old 04-19-2017, 07:22 PM Thread Starter
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Well, little update... I took the bike out today and tried to replicate the issue. I chopped the throttle a bunch and even wheelied it 6-7 times about a foot high and it never did it.. so I don't know, I guess I cannot replicate the issue so it's going to be hard to diagnose it.

It's only happened twice in the last 500 miles..hmm..

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Mod List
-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #12 of 17 (permalink) Old 04-19-2017, 07:26 PM Thread Starter
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Quote:
Originally Posted by trachito View Post
i strongly doubt it's the BAS. it's job is to turn off the fuel pump when triggered which would shut off all the cylinders. or does it shut off the spark on this bike? on my 1krr, it shuts off the fuel delivery.
That's what i don't understand either. I figured if it was a sensor of some sort it would shut the whole bike down, not just 1-2 cylinders. I'm guessing one of the coil plugs is just arching out or something? If it does it again i'm going to reach down there and just rotate them all if I can and hope that fixes it, if it keeps being a problem then i'll remove them completely and replace them.

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Mod List
-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #13 of 17 (permalink) Old 04-19-2017, 08:07 PM
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did any lights on the dash come on?


the bank angle sensor kills the bike, but if it was just a matter of it rattling around then it would make the bike run like a bag of assholes.


given that none of us but the op were on the bike when this happened it's a lot harder to say.


of course the BAS is a long shot, but stranger things have happened, and as i said it takes literally 2 mins to get to the connector.




it could be that he never seated the coils properly on the new plugs, that's a check that takes about 2 mins as well.




as i said before, you aren't going to get any resolution by doing nothing.
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post #14 of 17 (permalink) Old 04-19-2017, 08:43 PM Thread Starter
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Quote:
Originally Posted by wibbly View Post
did any lights on the dash come on?


it could be that he never seated the coils properly on the new plugs, that's a check that takes about 2 mins as well.




as i said before, you aren't going to get any resolution by doing nothing.
Nope, no lights came on...

actually I have a video of the bike running after the misfire if that's any benefit. It just sounded like one of the cylinders wasn't running, the bike was still moving though and working.

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-Akrapovic Slip on
-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #15 of 17 (permalink) Old 04-19-2017, 10:43 PM
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When you put the coils back on did you get a pronounced click click click as you installed them?


Also is your power commander still auto tuning?
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post #16 of 17 (permalink) Old 04-20-2017, 11:55 PM Thread Starter
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Quote:
Originally Posted by wibbly View Post
When you put the coils back on did you get a pronounced click click click as you installed them?


Also is your power commander still auto tuning?
I can't remember if I heard a click or not this was like 4 months ago, but I've done lots of plugs in the past and never did one wrong. Either way i'll check them again and make sure they click click back in.

Yes the PCV is still auto tuning.

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-Arrow Headers
-DynoJet PCV
-DynoJet Quick Shifter
-K&N Air Filter
-Servo Delete
-PAIR Block off
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post #17 of 17 (permalink) Old 04-21-2017, 12:18 AM
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The intention of the auto tune is to build a table and then disable auto tuning.

It's not for full time closed loop operation like your car.


Have you actually checked on the progress of the auto tune or did you load a base map and forget about it?
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