08 700 rmk won't idle!!!

[Big D rmk700]

When it is cold and you start it, it will idle at 1400 rpms for about a minute and then drop down so low the it will not even read on the screen. I believe it is in the tps,compress checked it last nite and that was ok. Any advice would be great going to dealer on wednesday so would love to have a few more things for him to check if it is not the tps.
Thanks Darren

 

[sled_guy]

Turn the idle screw up. Even though they are fuel injected they still have an idle screw/stop.

sled_guy

 

[Big D rmk700]

Where is the idle screw?

 

[Rick!]

Clean the black smegma off of the throttle plates and bores and recheck. Also, make sure you aren't dropping a cylinder due to a bad spark plug cap.

 

[Kraven]

T.P.S.

Turn the idle screw up. Even though they are fuel injected they still have an idle screw/stop.

sled_guy

I wouldn't do that, as it messes up the T.P.S. setting

See the INCREASING your IQ thread, info for re-setting is there.

Other possible causes of the low idle, torn throttle body boots, among other things

 

[sled_guy]

I wouldn't do that, as it messes up the T.P.S. setting

See the INCREASING your IQ thread, info for re-setting is there.

Other possible causes of the low idle, torn throttle body boots, among other things

Really? If cracking the throttle slightly open with the throttle flipper doesn't mess up the TPS then using the throttle screw won't either, they both rotate the butterfly shaft.

If the throttle screw wasn't ment to be used why is it on there?

sled_guy

 

[AndrettiDog]

I had an 07 D7 that did that same thing twice. It was tough to put in reverse because of that. Both times...had the dealer adjust the TPS.

 

[GKR]

Turn the idle screw up. Even though they are fuel injected they still have an idle screw/stop.

sled_guy

Sorry sled_guy but bad advice.

Setting the TPS right is critical for proper performance. The throttle screw is used to open the butterfly's from fully closed to slightly open to achieve the correct airflow for idle. The TPS is solely there to tell the ECM what the throttle position is so it can deliver the fuel correctly. It must be set right or the ECM will have a false reading of the throttle position and the fuel delivery will be off.
Follow the procedure to set it all correctly which involves backing the throttle screw completely off, setting the TPS baseline voltage, then turning in the throttle screw to achieve the TPS voltage setting for idle. This will result in the proper idle RPM and the vital link between the actual throttle position and what the ECM thinks it is.
There have been huge issues with Polaris CFI sleds due to poor TPS setting which is a relatively easy fix, make sure to do it right or you will be chasing your tail.

 

[Big D rmk700]

Hey thanks guy's for the help!! I called the dealership that I have the sled traded into and he said no worry's bring in that way when my new sled shows up!!! Hopefully that is soon since a lot of people have theirs already

 

[Kraven]

T.P.S.SETTING.

Really? If cracking the throttle slightly open with the throttle flipper doesn't mess up the TPS then using the throttle screw won't either, they both rotate the butterfly shaft.

If the throttle screw wasn't ment to be used why is it on there?

sled_guy

Yes, really.

GKR pretty much summed it up.

On a CFI sled, (not recommending this) if you set the T.P.S. to a lower voltage setting (.91 volts rather than .95) it actually LEANS out the fuel curve. The T.P.S. setting is that important, don't overlook it.

Check out the T.P.S. info under "INCREASING YOUR IQ" at the top of this section.