07 apex rpm's very low and stalls when warm on idle

[sx7001]

I guess Yamaha ditched the IAC on the 11+ Apex for a reason. I wonder if the new setup would work on the older sleds??

 

[TBay Sledhead]

I doubt that the electronic are there to operate it.

 

[sx7001]

I doubt that the electronic are there to operate it.

Yes, I just looked at the parts fiche. Totally different system.

 

[SugarCampApex]

Add my sled to the list of having the same problem. I can ride it for miles, come to a stop and it just dies. Then, it starts up fine. Frustrating for sure!

 

[TBay Sledhead]

Well ran both sleds today The parts sled still runs perfect and mine idles down to 1000 rpm. If I blip the throttle it will go down to 1000, if I ease the throttle up and back slightly it will stay at 1500. So I tried the intake pressure sensor and still the same thing.

 

[tomanytoyz]

nate007 reply has disappeared ?? from the 3rd page? i was going to say try what he recommends.but i still have it from when i repled to him.>anyway> i would give the Coolant Temp Sensor a try TBay Sledhead from the other good idling sled if you want to try it real quick.if not you may need to go out and get vacuum gauge..

 

[WinderFab]

tomanytoyz most likely this weekend I will try what nate007 said, can you post his reply again or pm me his post I don't remember word by word on what he said, thanks...

Does anybody know how much the IAC is worth, can't seem to find it on a microfiche,

 

[TBay Sledhead]

no part no for it. looks like it comes as part of the throttle bodies. look on the fiche under intake 2. $80 for a used one.

 

[TBay Sledhead]

Tried the computer.

 

[WinderFab]

Tbay Sledhead I was reading on the IAC and they say that you have to re syc the carbs if you remove the IAC,

Did you re syc the carbs after you installed the IAC from the other sled?

Do you have to re syc the carbs after you remove the IAC?

 

[tomanytoyz]

tomanytoyz most likely this weekend I will try what nate007 said, can you post his reply again or pm me his post I don't remember word by word on what he said, thanks...

Does anybody know how much the IAC is worth, can't seem to find it on a microfiche,

Go to page 3 and its the 4th reply down.hope you guys get this figured out!

 

[TBay Sledhead]

I only changed out the coolant end. I still don't have a vacuum gauge to re-sync. Too busy fixing other sleds. I figured that the air end was set up for that engine so I didn't change it. There was nothing in the air end when I disassembled it. All the moving pieces looked clean and no wear marks.

 

[sx7001]

I only changed out the coolant end. I still don't have a vacuum gauge to re-sync. Too busy fixing other sleds. I figured that the air end was set up for that engine so I didn't change it. There was nothing in the air end when I disassembled it. All the moving pieces looked clean and no wear marks.

Just crank the idle screw in till it comes up to 1500rpm when fully warmed up. Both sleds we did last week are running fine now. Throttle body tolerances change over time. deposits, wear, or what ever. The adjuster is their for a reason.....

 

[vx700xtc]

I only changed out the coolant end. I still don't have a vacuum gauge to re-sync. Too busy fixing other sleds. I figured that the air end was set up for that engine so I didn't change it. There was nothing in the air end when I disassembled it. All the moving pieces looked clean and no wear marks.

Just crank the idle screw in till it comes up to 1500rpm when fully warmed up. Both sleds we did last week are running fine now. Throttle body tolerances change over time. deposits, wear, or what ever. The adjuster is their for a reason.....

I could screw that adj all the way in, or even completely remove it... no change.

 

[WinderFab]

Vx700xtc I'm in the same boat as you, my idle knob does nothing when the motor is hot, I've tried it many times and the rpms don't move up or down,

So that must be part of the problem why are sleds don't idle when hot,

I might be getting a IAC from another sled in the next couple days, ill post back...