Abnormal idle when cold...Very cold! - ZX6R Forum
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post #1 of 25 Old 12-19-2016, 02:21 PM Thread Starter
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Abnormal idle when cold...Very cold!

Temp is below 10C, that means it's very cold outside!!! 0C is water freezing.
Bike acts like this, no FI light comes up or anything. Riding feels like it's overfueling and idle stops acting like this after some time.
Although there is no FI, this does not seem right. It should have higher idle but not like this. Any ideas?

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post #2 of 25 Old 12-19-2016, 03:07 PM
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Move somewhere warmer?
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post #3 of 25 Old 12-19-2016, 03:27 PM
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That is odd. I just started mine up the other day and it was about 38 degrees in the garage (about 4 C). Although the battery was almost dead and had to charge it up a bit, once it started it ran like it always does.

If you let it warm up and then restart it with the engine warm, does it still behave like that?

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post #4 of 25 Old 12-20-2016, 08:21 AM
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What year is the bike? Mileage?

Edit: Oh, 2010...

Vacuum leak, maybe? Maybe a fuel pressure regulator is sticking when cold? I'd lift up the fuel tank and hunt for any cracked rubber or plastic parts as the first thing I checked.

Edit 2: Has it been modified at all - aftermarket exhaust or power commander or anything?

Last edited by MR2Aaron; 12-20-2016 at 08:26 AM.
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post #5 of 25 Old 12-20-2016, 10:34 AM
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never been involved with injection on a motorbike ,mine is carbed but if that was a car engine ,i would say that the cold sensor that controls the fuel starting when cold would be faulty

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post #6 of 25 Old 12-20-2016, 11:50 AM
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I would definitely make sure the oil is the proper viscosity for those weather conditions.
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post #7 of 25 Old 12-20-2016, 01:34 PM Thread Starter
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Quote:
Originally Posted by RJ2112 View Post
Move somewhere warmer?
Suppose only for the winter, because summer is hot as hell!!! Though can't do that!

Quote:
Originally Posted by sbk1198 View Post
That is odd. I just started mine up the other day and it was about 38 degrees in the garage (about 4 C). Although the battery was almost dead and had to charge it up a bit, once it started it ran like it always does.

If you let it warm up and then restart it with the engine warm, does it still behave like that?
It takes too much time to warm up, so i let it run a minute or two, while i'm closing the garage door and putting my helmet/gloves on, then i ride it keeping low revs until the reading comes up. I will try the restarting in the next days, maybe tommorow.

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Originally Posted by MR2Aaron View Post
What year is the bike? Mileage?

Edit: Oh, 2010...

Vacuum leak, maybe? Maybe a fuel pressure regulator is sticking when cold? I'd lift up the fuel tank and hunt for any cracked rubber or plastic parts as the first thing I checked.

Edit 2: Has it been modified at all - aftermarket exhaust or power commander or anything?
I don't think it's a vacuum, unless there is a hole that i didn't notice.I took off the gas tank and airbox in order to change spark plugs some weeks ago. Same issue before, same issue now. Had a DNA air filter since i got it and a custom slip-on for 2 years i think.

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never been involved with injection on a motorbike ,mine is carbed but if that was a car engine ,i would say that the cold sensor that controls the fuel starting when cold would be faulty
Shouldn't this appear as a FI blinking on the dash? Have to do some research on this. Looking for air temp sensor? Coolant temp displays just fine on the gauge. Is there another for the cold start?
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I would definitely make sure the oil is the proper viscosity for those weather conditions.
I use what kawi suggests and it is the same oil i had on every bike i've owned
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post #8 of 25 Old 12-21-2016, 03:48 PM Thread Starter
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So, today i took the bike out again.

It was totally normal....Steady idle, just how it should be.
It is still cold outside, maybe even colder than yesterday.

I don't know what to think...
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post #9 of 25 Old 12-21-2016, 10:38 PM
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Quote:
Originally Posted by MrZ View Post
So, today i took the bike out again.

It was totally normal....Steady idle, just how it should be.
It is still cold outside, maybe even colder than yesterday.

I don't know what to think...
Maybe it just needed to fart
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post #10 of 25 Old 12-22-2016, 02:46 AM
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OP, You may have had some condensation in your gas tank. Small amounts of water will play havoc with how the bike runs..... did you by chance leave the tank nearly empty before the cold snap?

"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #11 of 25 Old 12-22-2016, 05:26 AM
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Originally Posted by RJ2112 View Post
OP, You may have had some condensation in your gas tank. Small amounts of water will play havoc with how the bike runs..... did you by chance leave the tank nearly empty before the cold snap?
I was just thinking of that. Had to have been something in the fuel, and that's most likely water.

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post #12 of 25 Old 12-23-2016, 05:25 AM
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My harley is fuel i njected and i always add stabalizer for the winter storage. Starts fine everytime. Fill the tank as full as you can with premium gas and add in the correct amount of stabalizer. Works well.
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post #13 of 25 Old 12-27-2016, 11:47 AM Thread Starter
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So, i had the abnormal idle and overfuelling shorta thing again today.It was not cold like the other days so i don't think it's because of the temperature anymore.

Quote:
Originally Posted by RJ2112 View Post
OP, You may have had some condensation in your gas tank. Small amounts of water will play havoc with how the bike runs..... did you by chance leave the tank nearly empty before the cold snap?
I do live in a high humidity area and the bike is parked outside. And i found out that my motorcycle cover isn't waterproof.... Gas tank was halfway full.

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Originally Posted by sbk1198 View Post
I was just thinking of that. Had to have been something in the fuel, and that's most likely water.
Could it be condensation?So much?

Quote:
Originally Posted by Elduderino01 View Post
My harley is fuel i njected and i always add stabalizer for the winter storage. Starts fine everytime. Fill the tank as full as you can with premium gas and add in the correct amount of stabalizer. Works well.
I don't do winter storage, i ride all year long. It may be parked for a week if it happens to rain all the time, but when it doesn't, i ride.
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post #14 of 25 Old 12-27-2016, 11:53 AM
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I would check to see if your filler neck drain line is actually clear. The dished out area 'below' the filler neck can allow water to pool, and some of it may eventually get slopped into the filler neck and then into your gas inside the tank. There is a small drain line at the lowest corner of the dished out area..... that one is meant to let any water that pools in that area to drain away.

Best to check and ensure it is clear of debris, or rust. It may take running a small stand of wire through the hole to ensure it is clear. If you have rust in that area, the drain is surely blocked.
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"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #15 of 25 Old 12-30-2016, 02:09 PM Thread Starter
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Quote:
Originally Posted by RJ2112 View Post
I would check to see if your filler neck drain line is actually clear. The dished out area 'below' the filler neck can allow water to pool, and some of it may eventually get slopped into the filler neck and then into your gas inside the tank. There is a small drain line at the lowest corner of the dished out area..... that one is meant to let any water that pools in that area to drain away.

Best to check and ensure it is clear of debris, or rust. It may take running a small stand of wire through the hole to ensure it is clear. If you have rust in that area, the drain is surely blocked.
I'm going to check this probably in the following week, since it's been cold again...Cold as "needing snow tires" cold...
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