TPS adjustment - too much voltage - bad tps?

[MrIQR]

Adjusting my tps. Sled is overfueling.

I’m getting full voltage (12.55) on both the wires instead of the 5.00v and .700v.
Does this mean my TPS is bad or ?

 

[MrIQR]

Correction - All THREE wires on the tps plug have the same voltage 12.5v. I must have a short somewhere or ?

 

[powdersnobb]

Are you putting voltage to the correct lead? Does you hear the ecm click when you put voltage on? Definitely not right.

 

[MrIQR]

Yes I’m powering it correctly. I’m to the conclusion my harness is bad(again)

 

[MrIQR]

I was right, it was the harness(again)

Any reason why I can’t run the idle higher then .940v? With .940 I only get 1400 cold and 1600 warm so it’s still a little low. Base is set dead on at .7.

 

[MrIQR]

1400rpm & 1600rpm***

 

[powdersnobb]

I was right, it was the harness(again)

Any reason why I can’t run the idle higher then .940v? With .940 I only get 1400 cold and 1600 warm so it’s still a little low. Base is set dead on at .7.

A tip someone gave me on FB; Set idle to desired RPM (1700+/- 200 RPM) then set your TPS to read .940. I did this and so far it seems to have worked well. Idles better cold and reverse works better. Ill test more this weekend. It is a apparently suggested by polaris directly for sleds that have idle issues. Mine has never idled cold since new and would still not idle with the .700/.940 TPS setting. Even warm it did not like to idle. I think it may be a BD turbo thing too.

On that note, if you go much above .950 it will not go into reverse and the ECM will not like it. I tried this and did not get favorable results. So far the best results are as said above.

To make the idle adjustment easier, you could also get a mikuni late model KTM 300/250 carb idle adjustment screw, cut the tip off, install a spring, and replace that PITA idle screw polaris put in. I will also be testing this over the weekend to see if it is affected by vibration. I will do a write up on it with part numbers if it works out well.

 

[MrIQR]

Thanks for the info.

Fouled brand new plugs on start up today.

Its a 17’ and I’ve got my use out of it. Thinking it’s time to let it go.