Another TPS adjustment question

[92GSXman]

I tried to set my tps by using an ohm meter and the instructions on www.plymouthlaser.com and I am having problems. It says that it should read .9 ohms when closed and go up to 5k ohms when you rotate the butterfly. Mine is not doing that. It's at about 3k ohms when closed and goes up to 10k ohms wide open. Theres not enough adjustment in my tps to make it go down to .9 when closed.

I tried another tps from a 92 GS eclipse and it's doing the exact same thing. I adjusted my idle stop switch using the factory manual so I know that's not the problem. I have searched and searched and can't find any other problems close to this one so please don't tell me to search. Thanks in advance for any help that you can offer!

Oh yeah, it's a 92 tsi awd.

 

[steve]

The spec for a good TPS is 3.5k to 6.5k ohms between pins 1 and 4. The resistance between 2 and 4 should change smoothly as you move the TPS. If your reading 10k and your not doing something wrong then the TPS is bad. Make sure your meter read 0 ohms with the two probes connected.

Charles is a smart guy but I have issues with his method. The total resistance of a given TPS can be anywhere within the spec above. The actual value of the +5 sensor voltage can vary from ECU to ECU. The spec for the TPS output is 0.48v to 0.52v on a 1G. So, the resistance between pins 2 and 4 needed to get that output voltage varies depending on the actual TPS resistance between 1 and 4 and the actual +5 sensor voltage.

If you have a logger setting the TPS so it reads 10% or 0.5v is the easiest.

Steve

 

[92GSXman]

The spec for a good TPS is 3.5k to 6.5k ohms between pins 1 and 4. The resistance between 2 and 4 should change smoothly as you move the TPS. If your reading 10k and your not doing something wrong then the TPS is bad. Make sure your meter read 0 ohms with the two probes connected.

Charles is a smart guy but I have issues with his method. The total resistance of a given TPS can be anywhere within the spec above. The actual value of the +5 sensor voltage can vary from ECU to ECU. The spec for the TPS output is 0.48v to 0.52v on a 1G. So, the resistance between pins 2 and 4 needed to get that output voltage varies depending on the actual TPS resistance between 1 and 4 and the actual +5 sensor voltage.

If you have a logger setting the TPS so it reads 10% or 0.5v is the easiest.

Steve

Don't have a logger, I'll get one asap! The meter reads 0 when nothing is hooked up. It reads about 10k also between pins 1 & 4. I wonder if it could be my volt meter? Both TPS sensors are doing the exact same thing, that's seems kinda weird to me. The resistance between 2 & 4 does change smoothly, but it's between 3k and 10k ohms, not the .9-5k that it should be.