2006 Polaris Sportman 500 4x4 EFI Engine Stalls

[cassmanbearcat]

it doent matter wether its warmed up or cold and it happens very random and not to often,,,but when you let off the throttle the engine stalls and dies and it will start right back up everytime and not do it again for weeks... where should i start looking to fix this?

[swampcat07]

I would change out the gas and run some injector cleaner through it.

Other thoughts are a bad sensor. It sounds like the efi can not respond quick enough to the throttle.

[CK1999_400ex]

i have a 06 sportsman 500x2 efi that did the same thing several times .. an the dealer said that the throttle cable needed 2 be adjusted slightly to take care of it ... they said that it would do it more in cold weather and be more noticable in the cold ... they said i could adjust the cable a little or adjust the throttle position senser slightly 2 take care of it ... i dont remember what they said to set the idle at but you should be able to find that out from the dealer or from your owners manual or a service manual... i would also run some injector cleaner and some good hi octain fuel throught it ...

[swampcat07]

Thanks CK I did not know the TPS could be adjusted without a programer.

Cassman let us know how it works out.

[CK1999_400ex]

it can be moved slightly on the bolts that mount it ... but you will have to have the dash on the tach setting and adjust it to set the idle speed to the factory setting to get it to idle properly... the tps has a spring in it that gets weak with use and can cause the problem ... it can be adjusted to take up the slack from the spring being worn.. but the tps will need replaced eventually .... you can also adjust the throttle cable to take up the slack also.... the vibrations that an atv experience are usually worse than an automobile and will cause the tps sensor to become out of adjustmen easyer than 1 on a car... and will cause the problem of it dieing like you are having ...

[cassmanbearcat]

Thanks all, this is for a friend and im relaying all this info to him...

[CK1999_400ex]

well let us know if it helps with it ...?

[Ajmboy]

* Added issue and manufacturer to thread title.