Adjusted TPS, question.

ottawaair · Feb 11, 2014

I set out to check the tps setting on my '12 pro r 800.

Once connected, I found the initial idle setting at .963 V.
I pulled the trigger to check the sweep, all looked good. No drops or flat spots.
When I pulled to WOT, the meter went to O.L. (open lead) It climbed to about 4.000V then to O.L.

so, I unhooked throttle cable and backed off idle screw.
My base setting was .713V

I adjusted to .698-.700V with screws tight.

Then adjusted idle screw to .940 with jam nut tight.

Reconnected throttle cable and did another sweep, making sure it went back to .940V

Still at WOT, it goes to O.L.
I then switched to the next range on my meter. It shows 4.11V
But in the 4.000 scale, it goes to O.L.
Tried with 2 different meters, same O.L.

sled runs good, plugs are always a little fat, that's why I checked the tps.

So, question is, why the O.L. in the .000 scale, and were my initial base numbers off enough to make a difference in how sled runs. (haven't rode yet )??

kt19 · Feb 12, 2014

OL when measuring voltage is over load. Open lead when measuring resistance. So if you are measuring 4.11 volts when in the 4 volt range you are over the range this is why you get the OL

ottawaair · Feb 13, 2014

well, I messed up something. Sled is idling about 2300 now.
I used the eBay tps tester found in another thread on here.
I'm going to try back probing and powering everything. Then recheck what's going on.

xc6rider · Feb 13, 2014

What did you use for a power source? And what reference voltage were you getting?

12v power up (with good 12v battery) of the ECM will get you thee exact reference voltage that the sled see's while running, so trying it that way may get ya on track!

Tonka1020 · Feb 15, 2014

What kind of meter are you using?

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FUchiZad · Feb 15, 2014

base idle setting .94

first, set your throttle cable where it needs to be
with the idle screw backed all the way out, set to .698-.70
turn in the idle screw in til you see .94
wide open throttle should end up being around 4.1

volts not ohms

xc6rider · Feb 15, 2014

Also, is this cold engine idle? Mine idles around 2300 as well when cold, then drops to around 1700 once warmed...

Tonka1020 · Feb 15, 2014

FUchiZad said:
first, set your throttle cable where it needs to be
with the idle screw backed all the way out, set to .698-.70
turn in the idle screw in til you see .94
wide open throttle should end up being around 4.3

ohms, not volts

Are you sure it's not volts instead of ohms? The above describes voltage settings.

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xc6rider · Feb 15, 2014

VOLTS!!

FUchiZad · Feb 16, 2014

volts indeed, thanks for the correction

I had to go double check the voltmeter to see what I had the knob set to. Luckily I did set it to volts, but I've been telling everyone ohms. Thought for a second I set a couple of these I did the other day wrong bout gimme a heart attack.

ottawaair · Feb 16, 2014

I was first using the ebay tester with 9 volt battery. I was getting 5.00V reference on the front pin.

Not sure on meter brand, but it's a decent meter ( cost about $170.00), and I also checked my settings against my old meter ($100 unit) and readings were exact between the two.

Yesterday, I made a harness to power up thru the ECM power plug by the clutch.
Connected wires to my truck battery for 12V power.
I left TPS harness plugged in and back probed the 3 wires.

Front wire reference voltage-- 5.03V
Middle wire at idle setting --- .940V
Removed throttle cable and backed off screw.
Base setting --- .700

So, the ebay tester and powering thru ECM with 12 volts provided the exact same readings.

But, my sled still idles high.

So, I left the base setting at .700. but backed the idle setting to .928
Idle still hangs a bit, but settles out to 1800-1900

I'm going to go back to my original settings before I touched it.
It was out of spec, but idled correctly.

Tonka1020 · Feb 16, 2014

Look for an air leak!! If sensor settings are in spec then likely you have another problem.

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mountainhorse · Sep 10, 2014

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Adjusted TPS, question.

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