Can someone Please tell me how to set a TPS on an 85 13B.
Thanks

 

Be sure to clean and lubricate the throttle linkage before adjusting. Also make sure the engine is completly warm.

Put the ignition on. (Not running though) Beside the air filter you should have a green connector. It will have three pins, two parallel to each other. Hook the ground wire of a multimeter to the pin which is not parallel to another and check for voltage to each of the other two pins. Set the TPS so that you have voltage to either one of the other pins, but not both. If neither has voltage, turn the screw clockwise. If both have voltage, turn the screw counter-clockwise.
You can rig a couple of bulbs as indicators if you like, but a meter works.

-John.

 

I must have a bad TPS. I am unable to get voltage on either pin.

 

You can grab a TPS off any first gen - they also interchange with the second gens, you'll just have to remove it from its braket and attach it to your bracket.

 

Don't trash the TPS just yet. They usually don't go bad. You don't have voltage on either one most likely because your TPS is way out of adjustment. Do yourself a favour and invest in a Haynes manual and make yourself the two light tester. Much easier to work with then a multimeter.

 

Not necessarily. The TPS gets it's voltage from, and sends a signal to, the ECU. At the test connector you are checking the signals to the vent and vacuum solenoid valves, which switch according to the TPS, but the signal comes from the ECU.
Just to double-check the obvious, you did check your meter at the battery and have the ignition on?

I would disconnect the TPS and check for 5 volts at the Brown/Black wire of the engine side of the connector with the ignition on. If it's there, reconnect it and check the same wire again. Then check the Brown/Red wire on the same connector for 1v to about 5v that varies as you push in the plunger on the TPS.
If you have 5v at the Br/Bl and it stays there when you reconnect the TPS, and you have a varying voltage on the Br/Red wire, it's not the TPS and you'll have to check the voltages at the ECU to find the problem.

-John.