06 919 running rough when cold - Wrist Twisters
 
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post #1 of 15 Old 11-26-2009, 10:07 AM Thread Starter
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06 919 running rough when cold

I have an 06 Niner with 6K miles. I have recently noticed it runs rough when cold, and the enricher must be used untill warm. I have changed the plugs, verified the fuel pressure regulator, different gas. The FPR holds a vaccum, and no gas on the vaccum side. When it warms up it seems fine. When it was new, I could hit the starter and go, no use of the enricher.

Any ideas where to look next?

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post #2 of 15 Old 11-26-2009, 10:14 AM
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Quote:
Originally Posted by west467 View Post
I have an 06 Niner with 6K miles. I have recently noticed it runs rough when cold, and the enricher must be used untill warm. I have changed the plugs, verified the fuel pressure regulator, different gas. The FPR holds a vaccum, and no gas on the vaccum side. When it warms up it seems fine. When it was new, I could hit the starter and go, no use of the enricher.

Any ideas where to look next?
fuel filter....... clean or replace air filter.... change map in the pc3



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post #3 of 15 Old 11-26-2009, 10:17 AM
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my 9'r has always been figgity when the temps drop as well, I just let it warm up a good bit before I take off.

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post #4 of 15 Old 11-26-2009, 10:18 AM Thread Starter
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Originally Posted by Pacojerte View Post
fuel filter....... clean or replace air filter.... change map in the pc3
Thanks, I will look at the filters next. I have no PC3.

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post #5 of 15 Old 11-26-2009, 10:25 AM
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Is it still all stock - air filter, exhaust, PCIII installed? If not, I would not worry about it. If it is stock, are you sure conditions are comparable? Was it stored in a warmer place before maybe? Have you moved to a colder location? Look for anything that might have changed besides the bike itself.

If all conditions are identical and you are sure you have a problem, see if there are any temperature sensors for intake air or engine temperature that might have failed. The factory service manual should show where they are and how to test them.

Report back when you decide what's what.

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post #6 of 15 Old 11-26-2009, 10:27 AM
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Filters would have to be almost totally clogged to cause a starting problem. Filter problems usually show up at higher engine speeds and wider throttle openings. In fact, a clogged/dirty air filter has the same effect as the enricher. It acts like an old fashioned choke.

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post #7 of 15 Old 11-26-2009, 10:28 AM
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Thanks, I will look at the filters next. I have no PC3.
buy a pc3....



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post #8 of 15 Old 11-26-2009, 10:30 AM
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Quote:
Originally Posted by west467 View Post
I have an 06 Niner with 6K miles. I have recently noticed it runs rough when cold, and the enricher must be used untill warm. I have changed the plugs, verified the fuel pressure regulator, different gas. The FPR holds a vaccum, and no gas on the vaccum side. When it warms up it seems fine. When it was new, I could hit the starter and go, no use of the enricher.

Any ideas where to look next?
How much time in between rides? My wife's bike does this, badly, during the winter. But, her bike goes 3-5 weeks inbetween rides. Stabil really helped to reduce this, if this is true for you.

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post #9 of 15 Old 11-26-2009, 10:42 AM
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Using the enricher to get things warmed up is not really a problem...if it runs crappy after warming up for a minute, THATS a problem!

Well, fire the engines! Spur this iron space-pony on!

"The Shadow"
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post #10 of 15 Old 11-26-2009, 11:08 AM Thread Starter
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Originally Posted by sike View Post
How much time in between rides? My wife's bike does this, badly, during the winter. But, her bike goes 3-5 weeks inbetween rides. Stabil really helped to reduce this, if this is true for you.
This is most likely what is wrong, I put everything back together, checking the air filter, and running it at idle without the filter, things seemed OK. I put the filter back in, and started it, can not duplicate the problem. I am going to get a new air filter and run some stabil, and good gas thru her and monitor it from there.

I have heard the ammount of ethanol in the gas now can really create issues with fuel systems if not run regularly.

I will post up more if things change, for now I will just ride it.

Thanks for the input to all, and Happy Thanksgiving! Ride Safe.

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post #11 of 15 Old 11-26-2009, 12:05 PM
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Jacksonville, FL ...................cold?

"Towards the end of the vid, it looks like she may have had a bafflectomy." - MarylandMike
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post #12 of 15 Old 11-26-2009, 04:45 PM Thread Starter
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Your right Jim, it is not cold. That's why I like Florida.

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post #13 of 15 Old 11-26-2009, 05:47 PM
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What month did you last fill from a gas station? If you are an intermittent and low mileage rider and live in an area where the gasoline formulation has seasonal change, you could be experiencing grief from low Reid Pressure "Summer" gas characteristics. Such gas will make an engine harder to start and/or run rough in cold weather until there is some cylinder head temperature to warm the intake ports. It's probably something else that is causing you grief, but the above is a possibility. If your tankful is recent and from a high volume gas station, it's something else you are dealing with.

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post #14 of 15 Old 11-26-2009, 07:53 PM
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get rid of stabil and use seafoam. stabil is horrible crap.

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post #15 of 15 Old 11-26-2009, 08:53 PM
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My 919 ran it's best at about 55 degreese F. I had a PowerCommander and Satos.


At 6K you shouldn't be having ANY problems. That thing isn't good n broken in yet. Warm up and let rip.

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