TPS readings

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geo

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• Jan 22, 2015

• #1

Question to the experts. Hopefully someone has compared.

If you use your PCV and a fully charged 12v battery to read the TPS voltage with a lap top, will it show the correct voltage-same voltage as a dedicated TPS tester and Fluke meter?

 

richracer1

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• Jan 22, 2015

• #2

Here are my thoughts on this, if you're required to calibrate the PCV to what the sled's TPS idle and WOT settings are, then it had better be what the ECM sees as well. Otherwise why calibrate the PCV with the TPS settings????????

 

G

geo

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• Jan 22, 2015

• #3

I have to "calibrate" my Boonybox to idle and WFO (it's #'s aren't in volts). Doesn't mean it is "calibrating" to the correct volts.

Maybe the volts shown though the screen are correct, maybe not.

The reason I question this is I was told in '13 the PCV doesn't show the correct #'s by the supplier of the PCV and kit included (I respect their R&D) and they gave me their reason why.
So I've used it as a reference point (reason to sync PCV) to see if things have changed over the years but have never used it as an absolute to reset-test TPS.

Three years and no issues with the way it came from the factory but VR3's have changed something and it isn't just idle. I don't have a stock sled and am trying to eliminate things one at a time.
Some posts in the VR3 thread have made me want to go through the whole TPS process just to eliminate that first.

I have a PCV, battery, lap-top. I don't have a calibrated tester or a Poo machine.

So,,, has anyone compared voltage readings through the PCV with those from a well calibrated tester and meter? Or, even better, a Poo machine?

 

richracer1

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• Jan 22, 2015

• #4

It would be interesting to know why the PCV would show different readings than the ECU would see.

My sled is not stock as well, but I just went and did the TPS process on my '14 using the PCV. Base was set to .703. Idle screw adjusted for a reading of .943.

Fired up the sled, let it warm up to 125, idled at 1750-1800. with no belt on, blipped the throttle (nothing drastic, mid you) and everything seem OK. I'll see this weekend.

 

NapaMatt

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• Jan 22, 2015

• #5

Using a 2010 Version PC-V on a CFI-4

I have found YES, SAME Volts.

Going to your V Force 3 Idle.. Yes. Have to up Idle a Bit.. Also the Sync.. Screw.. Is normally OFF. The Throttle Plates In All CFI's With around 3500- 4000 miles.. I betting are Not Round any more.

I used the EGTs if reference temps..

Using V Force 3 Reeds.. Temps Come up slower then stock Polaris reeds. Means yes they are Tighter. Do Loosen with miles. End up Flaking Off!!

When setting the TPS.. The sync screw only adjusts the Mag side, Keep that in mind.

 

NapaMatt

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• Jan 22, 2015

• #6

I Found a Take off 2012 600 with 50 miles on them off E bay.. 100$ Retail.. is 424$$$

So why NOT Replace the Whole Throttle Body as a Assembly!!

Fyi... All The TB's are the same... 600/700/800 .. 2007 - 2013.. Doesn't matter CFI 2 or 4

 

Last edited: Jan 23, 2015

diamonddave

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• Jan 23, 2015

• #7

NapaMatt said:

I Found a Take off 2012 600 with 50 miles on them off E bay.. 100$ Retail.. is 424$$$

So why NOT Replace the Whole Throttle Body as a Assembly!!

Fyi... All The TB's are the same... 600/700/800 .. 2007 - 2015.. Doesn't matter CFI 2 or 4

Click to expand...

True but the TPS changed in '13.

 

wfieldin

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• Jan 23, 2015

• #8

My PCV showed the exact same settings I set with my home made tester.

 

Merlin

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• Jan 23, 2015

• #9

geo said:

Question to the experts. Hopefully someone has compared.

If you use your PCV and a fully charged 12v battery to read the TPS voltage with a lap top, will it show the correct voltage-same voltage as a dedicated TPS tester and Fluke meter?

Click to expand...

I'm not an expert.

I set mine with a homemade 5 VDC power source but if I had to do it over again I'd be inclined to back probe the TPS terminals at the ECU connector while powering up the sled with the external power supply.

#1 - You can verify the reference voltage that is actually being sent to the TPS from the ECU.

#2 - You can verify the TPS signal that is being returned to the ECU, accounting for voltage drops in wiring / connections(however miniscule).

FWIW

 

AndrettiDog

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• Jan 23, 2015

• #10

diamonddave said:

True but the TPS changed in '13.

Click to expand...

Same part number for '12 and '13. They are right around $165 on Babbitts.

 

L

LoudHandle

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• Jan 23, 2015

• #11

diamonddave said:

True but the TPS changed in '13.

Click to expand...

After '13 MY? Correct? Started with the '14 MY. At least the harness changed from '13 to '14. My thought was the TPS plug change (pig tail added / different connector, Triangular three pin) to keep the condensation and water out.

 

diamonddave

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• Jan 24, 2015

• #12

LoudHandle said:

After '13 MY? Correct? Started with the '14 MY. At least the harness changed from '13 to '14. My thought was the TPS plug change (pig tail added / different connector, Triangular three pin) to keep the condensation and water out.

Click to expand...

Sorry. yes after '13. The '14 and up is different. The internals are the same but the connector and subsequent harness changed.