Idle rpm drop after WOT

[Boondocker82]

This is the one I purchased. Haven't got to use it yet but I'm sure it will work.
http://item.mobileweb.ebay.com/viewitem?itemId=281078141540&index=1&nav=SEARCH&nid=70022693016

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[TheBCSledder]

is the voltage reg accurate?

 

[Boondocker82]

Haven't checked it yet but I would assume so

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[TheBCSledder]

Kraven, I have the parts list and all for the home made tester. Can you impart some of your wisdom though? I have no idea how to hook up the tester and the volt meter to the TPS. Many thanks.

 

[Kraven]

TSETTING THE T.P.S.

Kraven, I have the parts list and all for the home made tester. Can you impart some of your wisdom though? I have no idea how to hook up the tester and the volt meter to the TPS. Many thanks.

Video is in the POLARIS 900 section, skip past the part about "synching" the throttle bodies.

There's also a schematic there tells you which wire goes where.

T.P.S. SETTING PROCEDURE

1) Make sure you have 5.00 volts (Using a HIGH QUALITY digital voltmeter) first before doing anything

2) CLOSE the throttle blades COMPLETELY! by backing off the "idle" set screw

3) ADJUST T.P.S to .70 volts +/-.01 volts for the 600/700/800

4) Turn "idle screw" until your digital voltmeter reads .94 or .95 (but this varies with model,spec is in the owner's manual)

5) Using an analog style volt meter, gradually open and close the throttle and watch the voltmeter move gradually, erratic readings indicate a faulty T.P.S.

T.P.S. TESTER, comes with the plug (plugs onto your 3-pronged T.P.S.) Available from your local POLARIS dealer for $ 50.00 PART # 2201519-A - you'll still need a high quality voltmeter to work with it.

 

[TheBCSledder]

Well, I got done checking my tps (using a computer power supply) and sure enough, it was at .726 instead of .70. Hmm quite a difference. I'll let you guys know if it fixed it tomorrow when I go for a ride.

 

[Boondocker82]

Did you need a special torx to get the screws loose or does a regular one work? If you needed a special one where did you get it?

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[TheBCSledder]

I was happy to find that you actually don't need a torques. It is just a regular Philips.

 

[TheBCSledder]

My sled ran fantastic for a while. Then it would idle at like 2,000+ (previously 1800) then it would drop back to 1800 after idling for a few minutes. Then it didn't drop at all and just sat idling at 2,000. I shut it off and restarted it, and it ran at 2,000 for a while then abruptly the rpm went down down down until to shut off completely. Then it wouldn't start again. Now when I try to start it, it starts for barely a second (not even long enough for the gauge to hardly light up), and I can hear that it is a high rpm like 2,000 or so. OMG I am so pissed at it. Could it be that the sensor is toast? I just re checked it, and the voltage I am getting is correct.

 

[Boondocker82]

Did you check for dead spots in the tps? Mine ran great for 300 miles and now it started doing this low idle. Mine is so bad that it only holds 900 rpm after a hard pull. The gauge goes dead it idles so low but mine idles low to begin with, about 1550 at sea level and won't idle at elevation. Do you run a PC-V?

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[TheBCSledder]

No pcv. btw it did fix the low idle issue when it was running. I don't have an analog meter so I couldn't check. I might replace the sensor and see what happens. don't know what else to do.

 

[TheBCSledder]

Question, should the voltage be exactly the same after I move the throttle bodies as before I move them? Because even though it is still in spec I was thinking it might be a sign of a bad tps?

 

[Boondocker82]

I'm not exactly sure what you are asking. The voltage should be the same every time you check it with the throttle plates closed...yes. For instance if you open the throttle and let it close, the voltage should return to that .93v that you set it at. I'm going to do mine tomorrow morning and I'll report back what I find. Mine got considerably worse the last few rides.

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[TheBCSledder]

Thanks that was what I was wondering.

 

[TheBCSledder]

The reason I was asking is because every time I move it it seems slightly off from the last reading although it is still within specs.

 

[Boondocker82]

2000 seems high for idle. Did you set your idle at.93v?

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[TheBCSledder]

Yes .93v when it was running right it was an idle of about 1800

 

[Boondocker82]

Got to mine today, idles at 1800 +/- 100. I didn't check what the idle screw was at before but I set it at.93v. The base line was perfect and I resynced them. I think my problem was more from them being dirty than anything. They were filthy.

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[TheBCSledder]

Thanks man glad it is running good for you. I am still at a loss with mine maybe I will take it in and tell them to fix it too bad it is so expensive.

 

[Boondocker82]

I was able to detect a bad spot in mine. Around 3.15v it would hit a dead spot. The ohm meter would read OL. It would only do it opening the throttle, on the way back down it would read fine. I couldn't get another one and leaving for Wyoming this afternoon so I'm just going to run it.

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