[Scott4700]

This has happened to my quad a few times, I will let my quad sit at idle for a short period of time, (15 minuets) after sitting at idle when I go to ride the quad again it will bog and try to die. If I let it shit and cool down some it will ride like normal, I’m not sure what could cause it, the quad is water cooled and the fan cycles as it should. Any ideas on possible causes?

 

[shadetree]

bad fuel pump ?, lack of fuel from dirty injector ?, bad c.d.i. ?. bad oil temp sensor trying to shut it down ?. seeing how ya did not tell us what quad this is ?????????..skate board...right ?..lol.

 

[Jacobrm28]

So I’m having almost the exact same thing happening with my 07 rancher manual. Just replaced piston rings, valve seals and all the other gaskets to get rid of a smoking issues. Put it all back together. And now this. Can ride it no problem but if it sits idle for 10 minutes it will cut off. Wait 5-10 minutes and starts up fine until again about 10 minutes. Will these things cut off automatically if it gets too hot? I filled the radiator up and after riding for a while the level didn’t go down any. It should drop a little when the thermostat opens. I’ve read about replacing thermostat, fuel filter, petcock, and assure the gas cap is well vented.

 

[Goober]

For Scott—Check you plug— if it’s too light maybe you’re getting fuel starvation. Otherwise clean your carb

Jacob you will have to get into diagnostics section

 

[Scott4700]

@shadetree the quad is a 2011 rancher 420 fe es and I haven’t had this issue in a while, I think it was the fuel pump heating up from the exhaust and vaporlocking and @Goober the quad if efi not carb

 

[Goober]

@shadetree the quad is a 2011 rancher 420 fe es and I haven’t had this issue in a while, I think it was the fuel pump heating up from the exhaust and vaporlocking and @Goober the quad if efi not carb

Thanks for reply have you checked oil temp sensor? Maybe it’s out of tolerance like mine is. The fan and oil temp light never came on. The FCU power connector was loose and the sensor resistance is too high to turn on the warning light.
As a result i was chugging up the trail and it kept missing I thought it was the fuel ststem but it was marginally overheated condition

 

[Scott4700]

@Goober that very well could be it, after a few moments of cool down it wouldn’t have an issue at all

 

[Goober]

Here’s a pic of my testing the sensor.
I only heated water not oil; it was 28 in the shop when I started so that may explain the 30kOhm. At 77F i read 10.7kOhm–a bit out of spec; at 212 (boiling water) i read 1.1kOhm–again a bit out of spec.

 

[Scott4700]

What does spec call for on the ohm rating

 

[Goober]

What does spec call for on the ohm rating

Yours likely different than mine; specs in your service manual.
Normally there will be high resistance but as the device is heated the resistance will drop until above 170F ( my model) there is no resistance and continuity causes the oil light circuit to close. Light and fan comes on.
I had a bad one on my trx300 the oil light wouldn’t even come on.