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1G TPS Setting

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punka44

Probationary Member
29
0
May 11, 2004
Bratislava, Europe
How can I set up properly TPS on mz Eclipse 1991 2.0 DOHC ? I have Chilton's manual but there is no measure or procedure how to set it. How do I know, that the TPS is set correctly?
Thanks. :confused:
 
John99GSX said:
http://www.plymouthlaser.com/tps.htm

This is a good guide for setting the TPS.

Except that it's wrong.

It doesn't apply at all to 2G's and setting the TPS by resistance on a 1G will only give you the correct setting by pure luck. The acceptable tolerance for the total TPS resistance it 3.5 to 6.5k ohms. The resistance needed to get factory spec 0.5v output between pin 4 and pin 2 varies depending on the total resistance of the TPS and what the actual 5v sensor reference is.

Steve
 
If you say so, I could always check the manual when I get home.

The original question is about a 1G "How can I set up properly TPS on mz Eclipse 1991 2.0 DOHC ?"

He also states you can perform a different method using voltages, but he does not go into that. Are you positive that you can not do this both ways to set the TPS?

I know I used that when setting the TPS on my 91 talon and it worked fine.

For my 2G I have dsmlink and used the voltage method to set it.
 
John99GSX said:
If you say so, I could always check the manual when I get home.
Don't take my word, check how the FSM tells you to adjust them.
Look up both the 1G and 2G adjustment procedures.

You'll find that the FSM tells you to adjust the TPS voltage between 0.48v and 0.52v on a 1G and that for a 2G you adjust based on where the internal IPS switches.

To assure yourself about my claims on adjusting by resistance, look up how a voltage divider works and run the numbers. The potentiometer is a variable voltage divider. As used in the TPS one end is grounded (pin 4) and the other fed the +5v sensor power (pin 1) and the wiper comes out on pin 2. When running the numbers keep in mind that with a pot the total resistance of the divider doesn't change, so as R1 increases, R2 decreases.

Now if you measure your TPS and sensor voltage then do the math you can calculate the correct resistance to give the required voltage. I don't have any problem with doing it that way but you can't just take some number from a website.

I talked with Charles and he a smart guy, I'm pretty sure it's not his fault that the VFAQ says the procedure is for all generations. It's not for a 2G and it's not accurate for 1G's for the reasons given.

Steve
 
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