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Putters at low rpms
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Putters at low rpms - May 7, 2011, 05:28 PM

Here's the run down... Earlier today, I rolled up to Colemans in Falls Church and on my way there I got stuck in some slow moving traffic on 495. While in this traffic, I noticed the bike would kinda putter at around 3 or 4 rpms in 1st. As I sped up, it was fine.
I just got back in, but while I was out, I figured I would try to duplicate the issue. As sure as shit stinks, it would still putter at the low rpms. Of course I'm in 1st when its puttering, and I would say I'm doing 10 to 15 mph. I could be going faster, but I really wasnt paying attention. I was focused on what was going on.

What could be going wrong?

FYI - 09 Gixxer (duh). 10,500 miles, Full Yoshi exhaust and PCV.
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May 7, 2011, 05:32 PM

coil or plugs in my opinion. i had the same problem with my r6 and i checked everything and it was one of my coils.


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May 7, 2011, 05:46 PM

Just had a 7500 service in March (i know - i'm a little late). Plugs were taken care of. Could one have fouled so soon? As you could tell from the question, I'm not all that mechanically inclined.
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May 7, 2011, 06:11 PM

Sputtering and herky/jerky at low RPMs that disappears when the engine spools up on a FI vehicle is usually indicative of something electrical.
I had that problem on my RC and a remap smoothed it out.
I had that problem on my Volkswagen and it was a bad coil.
A friend had a problem on his ZX-12 and it was a bad plug.



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May 7, 2011, 08:41 PM

Quote:
Originally Posted by badgixxer View Post
Just had a 7500 service in March (i know - i'm a little late). Plugs were taken care of. Could one have fouled so soon? As you could tell from the question, I'm not all that mechanically inclined.
spark plug couldnt foul this soon. i would check the coils for spark.


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May 7, 2011, 08:42 PM

is your bike tuned/mapped for the aftermarket exhaust and PCV upgrades? If not, remove them but leave on the decals If it is tuned and mapped, I'm pretty sure your map isn't for low idle cruising

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and this is not a very tech savvy site....IE "check coils for spark" wtf

Last edited by suprazxkawi; May 7, 2011 at 08:45 PM..
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May 7, 2011, 09:14 PM

Quote:
Originally Posted by suprazxkawi View Post
is your bike tuned/mapped for the aftermarket exhaust and PCV upgrades? If not, remove them but leave on the decals If it is tuned and mapped, I'm pretty sure your map isn't for low idle cruising
I just installed my PCIII last weekend and rode for the first time today after install. It's slightly sputtering when I'm stopped, which doesn't seem to be as bad as yours. It never did that before install, and I am running a different map since I have yet to find one to match my slip-on; that is likely my issue. Try what supra said.


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May 8, 2011, 08:39 AM

There are too many factors that could cause this: dirty plugs, dirty carbs or fuel filter, mapping, electrical gremlin... U need to have someone look at it, there is no way to find out what it is based on your description.


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May 8, 2011, 10:54 AM

Quote:
Originally Posted by Leoallafila
There are too many factors that could cause this: dirty plugs, dirty carbs or fuel filter, mapping, electrical gremlin... U need to have someone look at it, there is no way to find out what it is based on your description.
Dammit. I was hoping I wouldn't have to take it in.

I'm not getting how the plugs would be dirty so fast. Just had that done in march.
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May 8, 2011, 03:18 PM

Quote:
Originally Posted by Leoallafila View Post
There are too many factors that could cause this: dirty plugs, dirty carbs or fuel filter, mapping, electrical gremlin... U need to have someone look at it, there is no way to find out what it is based on your description.
09 gsxr is fuel injected


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May 8, 2011, 08:21 PM

throttle position sensor need readjusting? has been known to cause the herky jerky at low speed on some bikes


*Not intended to be a factual statement.
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May 10, 2011, 01:56 PM

Remove the PC-V and take it for a spin.


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May 11, 2011, 02:24 AM

Quote:
Originally Posted by Dark
Remove the PC-V and take it for a spin.
I've actually thought about this as my first action into trying to resolve. My only thing is that #4 plug was a bitch to get to because of the space. I'm off today, so I'll be trying this to see if it fixes the issue.
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May 11, 2011, 08:13 AM

Quote:
Originally Posted by badgixxer View Post
I've actually thought about this as my first action into trying to resolve. My only thing is that #4 plug was a bitch to get to because of the space. I'm off today, so I'll be trying this to see if it fixes the issue.
It'll be worth the time and effort to know if it's causing the problem or not.

The PCIII was notorious for similar problems and removing the unit would almost always resolve the issue.

If the PCV is in fact causing the problem I would investigate your connections, the PCV harness for damage, perhaps connect to it with the laptop, verify that it's functioning normally, and that it's still storing the proper map (power commanders are known to drop maps).

After it's removed, if the problem remains then do not reinstall the unit until after you discover the problem.


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May 11, 2011, 11:12 AM

Quote:
Originally Posted by suprazxkawi
is your bike tuned/mapped for the aftermarket exhaust and PCV upgrades? If not, remove them but leave on the decals If it is tuned and mapped, I'm pretty sure your map isn't for low idle cruising
1. Of course it's mapped. Why would I install a PC and not load the map. Wtf?

2. I'm sure the map is for low idle cruising. This just recently started happening. I put the PC last year and load the correct map.

If you had nothing positive to contribute to helping resolve the issue, you should've kept that smart ass comment to yourself.
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