TPS testing

[snowman429]

I've read the post on testing the TPS with the homemade tester. Every regulator I have tested at my local radioshack were out of spec. So my question is can you power up the sled and test it that way? I have searched and couldn't find any info on this.

 

[jeepin270]

Why dont you just buy the ebay tester? I jus ordered mine cause all the regulators I found at radio shack were off. 40 bucks shipped

 

[snowman429]

I might just do that. I was hoping I could test it before our next ride.

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[krazytoy]

Instead of the cheesy voltage regulator I wired in a potentiometer so I could adjust the voltage perfectly every time, instead of the 9v battery I also used a old 9v wall charger for some toy my kid broke years ago, the wall power is much smoother than the power from a battery.

 

[krazytoy]

Heck your just up in Rigby, let me know if you want to use the tester I made?

 

[milehighassassin]

How do I find said Ebay tester?

Edit... Search: "Polaris TPS" returned a lot of results.

 

[snowman429]

Heck your just up in Rigby, let me know if you want to use the tester I made?

Is this Jason?

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[krazytoy]

Yes Jarred...

 

[jeepin270]

How do I find said Ebay tester?

Edit... Search: "Polaris TPS" returned a lot of results.

There is another recent tps thread that has a link to the eBay tester. The guy that makes them is a forum member.

 

[PaulAnd]

PU-47466
https://polaris.service-solutions.com/Detail.aspx?id=332
try this

 

[milehighassassin]

There is another recent tps thread that has a link to the eBay tester. The guy that makes them is a forum member.

I spoke with him a little through email. I ordered one, should have by next week.

There are two on eBay. One is nicer looking which I ordered. The other comes with a cheap harbor freight multi meter and is about $15 less. I'd rather have quality for $15.


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[Tonka1020]

Instead of the cheesy voltage regulator I wired in a potentiometer so I could adjust the voltage perfectly every time, instead of the 9v battery I also used a old 9v wall charger for some toy my kid broke years ago, the wall power is much smoother than the power from a battery.

FYI. I feel that is a BAD idea!

I did some bench top testing and found that you can indeed get an exact 5.000v reference, which is great but when I plug in the tps, the reference voltage dropped to 4.789 volts. Using that voltage to adjust your tps could cause your timing to be significantly retarded and cause your sleds motor to detonate.

Voltage dividers only work if the load they are used on does not change. Your tps is a potentiometer, and as it changes so does the load it produces. Thus you can never actually get a potentiometer to create a voltage that is stable when used on another potentiometer!

Again, I urge caution! Electrical theory is a bitch..



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[retiredpop]

PU-47466
https://polaris.service-solutions.com/Detail.aspx?id=332
try this

Authorized dealers only site.

 

[PaulAnd]

Sorry ^^ got mine at local dealer, love it!

 

[krazytoy]

FYI. I feel that is a BAD idea!

I did some bench top testing and found that you can indeed get an exact 5.000v reference, which is great but when I plug in the tps, the reference voltage dropped to 4.789 volts. Using that voltage to adjust your tps could cause your timing to be significantly retarded and cause your sleds motor to detonate.

Voltage dividers only work if the load they are used on does not change. Your tps is a potentiometer, and as it changes so does the load it produces. Thus you can never actually get a potentiometer to create a voltage that is stable when used on another potentiometer!

Again, I urge caution! Electrical theory is a bitch..



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You sir are 100% correct and I found this out the hard way! luckily it just cost me some cheap radio shack parts and I did not hurt the sled. I went and bought the correct voltage regulators and reset everything, sled runs awesome now, live and learn...