TPS adjustment v star 1100 - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 12 (permalink) Old 10-27-2014, 06:05 PM Thread Starter
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TPS adjustment v star 1100

I have a 2003 v star 1100 custom, pods, dyna ignition, and I get the clunk sometimes when I start it if I give it more choke than it needs and it normally clunks loud when I kill it (I am starting it correctly). It eventually twists the bolts on the starter motor.

I want to check the tps to make sure everything is in spec because from what i've read that is the likely culprit. However, I can't seem to get a reading when I try to measure the resistance. I've never used a multimeter before, so I'm guessing I'm the problem.

Can someone tell me how to get a reading? I've read in the manual what to touch to which wire, but I can never get a reading. On the wiki page it says not to stick something larger than a pin in the connector under the seat, but I don't even know what I would stick a pin too. I have tried touching the the metal part sticking up corresponding to the wire, but I can not get a reading from that. Any help is appreciated, thanks.
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post #2 of 12 (permalink) Old 10-27-2014, 06:10 PM
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i got some adaptors for the leads with aligator clips on the ends.its hard to hold the pins while turning the throttle
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post #3 of 12 (permalink) Old 11-03-2014, 06:53 PM Thread Starter
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So I got the aligator clips and same result. When I say I can't get a reading, I mean I never get a reading, not like I do now and then but can't keep the pins on it. I tested the aligator clips on a battery and they work. So it's not the multimeter or clips. The meter always reads -1, which is what it does when I short it together. When I put it on 2000k ohms I can get a reading of 100, and sometimes it fluctuates to 300 but I think that is just because it's not a very expensive multimeter.

I included some pictures of how I hooked it up incase I'm doing something wrong.

Could the tps be shot, but my bike is still running alright because I have a dyna 3000?
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post #4 of 12 (permalink) Old 11-03-2014, 07:43 PM
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ok i'm not great with electronics,i bought a cheap meter from harbor fr, which i broke trying to plug in the leads,then went to lowes and paid $30.00 for a decent meter.plus aligator clips.the instructions i had were not the best so,plug the black lead into the common hole and the red lead into the v-ohm hole, and set the dial to 200 ohms,then using the under tank three pin plug follow the instructions in the wiki.i myself used clymers so there may be differences..i may be giving you bad advice,you said you have the dyna ignition i dont know how that acts with the tps ?

Last edited by nick57; 11-03-2014 at 07:56 PM.
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post #5 of 12 (permalink) Old 11-03-2014, 08:14 PM
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Meter

Looks like you are looking at the correct half of the connector. But be sure you are not looking back at the igniter unit.

I believe you are using to great a range on the meter. You need a range of 1K Ohms or 2K Ohms to read 700 Ohms. The 3,000 Ohms reading use no higher than 10K Ohms. The K is an abbreviation for thousand. The 2000K range would actually be 2 million Ohms full scale.

Be sure there can be no Voltage on the leads you are checking. The -1 reading could mean over range.

Dave
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post #6 of 12 (permalink) Old 11-04-2014, 07:05 AM
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When you touch the leads together you should get a reading of ZERO. Ohms is a measurement of resistance. When you touch the two leads directly there is no resistance in that circuit and therefore your scale should read zero. Anything different from that and you need to first get your meter correct. And like linerdave said, make sure you are on the igniter side of the plug

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post #7 of 12 (permalink) Old 11-04-2014, 10:55 AM Thread Starter
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What I means is 2000K is the only setting where it does not read -1, I have tried all of the other settings and all it reads is -1. And I'm looking at the side of the plug that leads to the tps on the carb.

When I touch the leads together it reads -1. This is the second multimeter I've used, the first was from amazon and did the same thing, the second from harbor freight. It seemed unlikely that both would be bad but I'm gonna go to home depot and pick up a nicer one like Nick said and try again.
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post #8 of 12 (permalink) Old 11-04-2014, 11:18 AM
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Are you sure you have the leads plugged into the correct port on the tester itself. Yes it does seem odd that multiple testers would be consistently incorrect. I'm not great with one and use it so rarely that I usually have to check myself to make sure I'm using it correctly.
There are tests you can do on both sides of the plug. One checks resistance between the igniter unit and the tps and the other checks the resistance of the sensor itself. Make sure you are using the correct test at the correct time.
I had a fight with my TPS once before too. Keep at it and you will get it.

2006 V-Star 1100 Classic
Completely debadged
Silverado windshield and passing lamps
Floorboard extensions
OE Highway bar with custom mounting brackets
Kuryakyn Dually ISO Highways pegs
Kuryakyn grips
Passenger floorboards
Barons Nasty Boy Slip-ons
Maxair pods
Mustang seats
Kuryakyn led headlight halo
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post #9 of 12 (permalink) Old 11-04-2014, 07:36 PM
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Is the 9 volt (or whatever) battery in your tester any good?
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post #10 of 12 (permalink) Old 11-04-2014, 10:34 PM Thread Starter
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Problem is fixed. I was able to test it with my third, slightly more expensive multimeter...guess I just got the luck of the draw with two bad units. TPS was slightly out of spec, about .86-.9 at no throttle. Set it to .7.

Thanks for the help
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