How to: Adjust your TPS

[Andre]

@RIZLA750  The right hand side one is the STPS. If out of spec it needs to be adjusted. See froudy's post above for this.

[Andre]

The same large grey connector that is pictured in @RickC reply #1 can be used to read the resistance when adjusting the STPS.

You also need to remove the air filter. Stick a hand into the air box and close a secondary throttle valve (STV) by pushing it with a finger.

If you don't have alligator clips for your multimeter, have a mate do the STV closing for you.

[Dan B]

Hey guys. Bought my 14 about a month ago and have been trying to work out a bogging issue at high rpm. Did this tps adjustment and was able to get 1100 ohms when the throttle is fully closed but I can't get more then 2700 ohms when i wind the throttle open.

I took off the tps and rotate it by hand and even when wound to maximum it never goes higher then 2700 ohms.

Could this be causing the bogging by starving the motor of fuel? Do i need a new TPS?

[mjgt]

I would say that's a fair bet, see if you can borrow a good one to test, if it works you need a new one if not you've only lost a bit of time.  Someone on here may be able to help

[Dan B]

Yeah thanks mate!

If they are too expensive to replace I will be on here later seeing if anyone lives in Newcastle with a 14!

[KiwiCol]

Hi Dan, I had 'odd' readings on my TPS as well, bit the bullet & paid $165 for a new one from Suzuki. Had to wait about 4 weeks to get it in from Japan & when I did, damn readings were no better (or not much) than the one I replaced!  I couldn't get 1.1k ohms at closed or anywhere near 4.3k ohms on wide open. think I got .285 at closed & 1.7 at wide open.
Bike still ran the same with either of the TPS's in - just slightly rich (I think) and a bit of a 'surgeing' at low - mid throttle, but pulled fine to red line without missing a beat.
Reckon I wasted $165 on a new TPS as even a new one doesn't give the reading you're supposed to get.

[grog]

very disappointing col, i get correct from mine. no answer from me. its one of the most important sensors, tells the computer where youre at. very strange result

[Andre]

Col, "odd readings" may be due to the multimeter? Tried with another one? Put in a new battery in the meter?

[Dan B]

Hey col sucks that you wasted the money on the new tps. If your bike is still pulling hard at higher rpm with only 1.7k ohm then it's a safe bet the bogging of mine at high rpm is unrelated to the tps!
Also after what you said andre I tested my multimeter on a few resistors I had lying around and it seems fine?
Back to the drawing board i guess 

[KiwiCol]

Col, "odd readings" may be due to the multimeter? Tried with another one? Put in a new battery in the meter?

Yeah, I thought it could be the meter (or the operator) but it reads correct for everything else I use it for . . . I put a new battery in anyway, same result.
I left the new TPS on the bike as those readings were slightly higher and closer to spec than the original, just tested the original the other week as it happens, it's sitting in the box the new one came in, same readings.

[grog]

iwould be really pissed off Col. new one faulty. ask for a new one, i would. not within specs, written in manual. just plain faolty. get up them, be a true suzuki rider. nothing to lose.

[KiwiCol]

Think I should buy a new meter & see how that goes, or maybe take the tps to an auto sparky & have them check the readings as a comparison before I barge into the only Suzuki shop in town & say it's faulty & I want a replacement. 
Christchurch is a very small place compared to Brissy, so one has to be a bit careful.

[grog]

not often meters are faulty, i have at least five, cheap to expensive. jaycar/digitech i use, maybe 3 yrs now. all day, everyday. just as good as my 400 dollar fluke. my first one was just as good, left it under car somewhere, bought exact same. not sure if avail. in nz, i can post you one if necessary. https://www.jaycar.com.au/economy-true-rms-autorange-multimeter/p/QM1321

[Andre]

Meters may be rarely faulty but still would have it double checked before raising the issue with the dealer. It is very odd that both old (defect?) and new have similar off-the-wall readings.

[grog]

agree Andre. very odd