09 Polaris Dragon 800 Irregular Idle

[evandaigneault]

ok, so i have an 09 Dragon 800. It just got a new top end and it has an irregular idle when i go up in elevation. I start at sea level usually and by the time i am over 2000 feet it will only idle at 1200 RPM's or so. It usually idles fine in the parking lot. It was doing this before the top end went so the dealer thought it was related to the top end. Apparently not.

My dealer has had the sled for the last month and cant figure out what it is so far.

Any ideas? It is not the voltage regulator/ecu as mag suggested to me about a month ago. I had the dealer do an OHM test and it checked out okay.

Any thoughts?
Thanks
Evan

 

[NapaMatt]

Have you Checked The TPS Yet???


Why not Reset it and the Idle at the HIghER Elevation!!

Less OXygen Going UP!!


My .o2

matt

 

[MNSLEDNECK56308]

I have the same issues, even with my Power commander. I'm not able to test much at elevation but my last trip, i found my oil pump to be running 22.8/1. I'm hoping this has something to do with it! However you would know if this was your problem as it sucks oil like crazy!

 

[Jkinzer]

have you guys done the latest flash? polaris released a new flash for sea level guys towards the middle of april. i'd start there

 

[GKR]

You need to do the TPS baseline adjustment. Don't just tweak the idle setting to the .930V, do the proper baseline adjustment first. Look in the IQ forum "sticky" for details.

 

[evandaigneault]

the tech's said the TPS was the first thing they checked and that it all checked out ok in the shop.

 

[GKR]

Be careful with this one. If they just verified the TPS setting at idle, it still may be off. The need to verify the baseline is correct. This is basically turning the idle stop screw to zero and checking the TPS voltage there. If it's off on the baseline then the TPS setting at idle may give them the right voltage but it's still off as far as what the sled needs.
Don't get me wrong, it could be something else but in my opinion this is a common problem and if you do the baseline test you will eliminate that as a possible contributor.

 

[diamonddave]

Be careful with this one. If they just verified the TPS setting at idle, it still may be off. The need to verify the baseline is correct. This is basically turning the idle stop screw to zero and checking the TPS voltage there. If it's off on the baseline then the TPS setting at idle may give them the right voltage but it's still off as far as what the sled needs.
Don't get me wrong, it could be something else but in my opinion this is a common problem and if you do the baseline test you will eliminate that as a possible contributor.

GKR is absolutely correct on this one. Because if baseline is off, then improper air flow will occur and the throttle body butterfly position will be incorrect. You could have the proper idle voltage with the incorrect butterfly positon, this will drastically affect fuel/air mixture. T-bodies should be removed for this procedure and should be done to any CFI with a quirky runnability issue. I would also be looking at the reeds and the reed boots very close for this type of complaint.

As for your VR, I just performed the latest Polaris Diode test (can't ohm test a VR) and according to the specs, this failed VR (Eric W's) tests good according to the latest bulletin from Polaris. The VR is almost dead for the signal (orange wires) that go to the ECM. I will be starting a thread with a little more info on thiis when I get the time.

 

[NapaMatt]

X2 on that!!!


Check the TPS...


my .o2