High Idle update

[Depmodeche]

Well, the dealer changed the thermostat; changed the temp sensor at the bottom of the radiator, flushed the cooling system and replaced the coolant; and took off the right side air box and dumped out a nice puddle of water and oil (according to the mechanic), and he also cleaned the air temp sensor while he was in there, or at least wiped it off.

The problem is still there!

The mechanic at the dealer in Fairbanks called Kawasaki, and of course they blame the Power Commander. Well, it could be, but I'd be surprised.

The mechanic is gonna call Kawasaki back and I'll stop in there tomorrow.

T-Man, I thought for sure we were on the right track with the cooling system, but now I'm stumped. If you or anyone else has any other ideas, I'm listening!

Thanks.
Dep

[ppark]

Did you try to adjust the idle using the knob on the R-side of the engine?

[Depmodeche]

Originally Posted by ppark

Did you try to adjust the idle using the knob on the R-side of the engine?

Yes, I have used that knob to adjust the idle. It does kinda flop around on that little bracket, and I thought that might be the problem, but even when I disonnect it from the bracket and move it all around the idle doesn't change.

What were you thinking?

Dep

[ppark]

Originally Posted by Depmodeche

Yes, I have used that knob to adjust the idle. It does kinda flop around on that little bracket, and I thought that might be the problem, but even when I disonnect it from the bracket and move it all around the idle doesn't change.

What were you thinking?

Dep

I have used that knob and it works fine on my bike which has TFI installed.

[ppark]

Just a long shot but what did you do w/ the ISC valves? If they are removed, are the wires OK and not cross connceted somehow?

[Depmodeche]

Originally Posted by ppark

Just a long shot but what did you do w/ the ISC valves? If they are removed, are the wires OK and not cross connceted somehow?

What are ISC valves? I haven't made any changes other than installing the Power Commander.

There was 2000 miles on the bike AFTER all the modifications were complete and THEN the problem appeared. And I HAD ridden it in very cold weather during that 2000 miles and the problem hadn't happened. So either something got dirty or something went bad roughly 2000 miles after all the work was done.


Whatever the problem is, it only occurs when it's below 65 degrees outside. Never above 65 degrees, and it doesn't matter if the bike is warmed up or not.

Dep

[ppark]

Originally Posted by Depmodeche

What are ISC valves? I haven't made any changes other than installing the Power Commander.

There was 2000 miles on the bike AFTER all the modifications were complete and THEN the problem appeared. And I HAD ridden it in very cold weather during that 2000 miles and the problem hadn't happened. So either something got dirty or something went bad roughly 2000 miles after all the work was done.


Whatever the problem is, it only occurs when it's below 65 degrees outside. Never above 65 degrees, and it doesn't matter if the bike is warmed up or not.

Dep

This is Idle Solenoid Control located on the right side air cover. It controls the idle speed and fast idle when starting up. Most people remove them when doing the air mod. Perhaps this is malfunctioning. Try disconnecting the wires to see if the problem goes away.

[Depmodeche]

Originally Posted by ppark

This is Idle Solenoid Control located on the right side air cover. It controls the idle speed and fast idle when starting up. Most people remove them when doing the air mod. Perhaps this is malfunctioning.

Haven't touched it, but that's what we might look at next.

Not sure why it would only do it when it's cold out. I mean, it's SUPPOSED to raise the idle when it's cold out, but NOT if the bike is warmed up, so I'm not sure. I'm gonna take it apart and look at it. Make sure it's clean.

Thanks,

Dep

[T-man]

I am coming back to the temperature sensor...confirm the wiring is good to the ECU from the sensor. I hate to think it is the ECU...that would be LAST possible resort.
Disconnecting the ISCs would remove the extra air, but the ECU is still adding fuel to maintain the A/F ratio so it may go deathly rich. I would try it but don't expect miracles. Also, a wiring issue that would engage the ISCs would not be temp dependent.
Have the vacuum lines been checked for cracks?
One other concern is the TPS...not sure why it would be temp related though.
PCIII should make no diff...it does not control engine speed. I am not sure but if you remove the power supply to the PC (depending on the vintage of the PC), you could disable it. Depending on wiring, the engine may or may not run.
This one is a challenge...what did the Kaw mechanics suggest, other than PC removal?
I would want to get signal data for all sensors to make sense of this...the only one that should show a marked diff is the air temp sensor.
Keep us posted, Dep.

[kingofwings]

What kind of difference in the idle are we talking about?

[Depmodeche]

The difference in RPM is the same difference as regular idle compared to having the choke on.

Gonna see if they can pull the tank for me today and double check my connections from the Power Commander to the Throttle Position Sensor...make sure the wiring is clean and dry. Not sure why that would be temp related, but i's worth a check.

Mechanic said he called Kawasaki and they said to look at the air temp sensor.

Been riding around all morning in the 50 and low 60 degree weather trying to get a sense of what's happening, and I'm convinced now that the high idling is erratic. Sometimes it's a little high, next traffic light I stop at it's very high, next traffic light it might drop down to normal for a bit, until I take off from the light, and then shifting from first to second I can already tell the idle's back up.

It's almost like the throttle cables are in need of oiling, but there's no way that's the problem because I can see the actuator on the intake and I can watch it return to full closed every single time.

Will be stopping at the dealer soon and will report back as soon as I know something. Thanks again.

Dep

[Depmodeche]

Went back to the dealer and at first we were focusing on the ISC valve and then we considered that it might very well be the Throttle Position Sensor ITSELF... although not sure why temp would affect that.

End result: they didn't have any parts in stock, and they were kinda busy, so we didn't do anything.

Rode around all morning in low 60 degrees with the problem occuring. The air temp went up to 70 and it dissapeared. I took a ride out to Delta Junction and hit a cold spot... dropped down to 55 degrees... and sure enough the high idle was back. What a mystery!

Thanks again. Will keep y'all updated.

Dep