Hi, would someone have the "diagram" on how to make a light tester for adjsuting the TPS.
The TPS on my (1987 N/a) is out of whack and I need to have it adjusted. I searched the forum on how to make a tester but what I found was not clear to me. I am hoping maybe someone has a diagram.

my regards

Pete

 

I'll look for my diagram at home but...

Making a Throttle Position Sensor Test Lamp (Dana Sullivan)

You can make a test light yourself fairly easily. Take two turn signal bulbs or similar type lights and solder a piece of wire between the two cans of the bulbs. Take another length of wire and solder one end to one can. This wire is your common ground wire, this will attach to the Black w/white stripe wire (ground) on the gang plug.
There should be 2 wires running out of the two remaining connectors. Solder a piece of wire to the + terminal of each light bulb and run one each to the two remaining connectors.

Throttle Position Sensor Adjustment (Glenn Heidel)

1) Warm up the engine, then stop it.
2) Connect the checker lamp to the check connector (green).
3) Turn the ignition switch on and check whether one of the lamp illuminates.
4) If both lamps illuminate or if neither does, turn the throttle sensor adjust screw until one of the lamps illuminates.
a) If both lamps illuminate turn the adjust screw clockwise.
b) If both lamps do not illuminate turn the adjust screw counterclockwise.


I'd just like to add that I found the best results by turning the screw counter-clockwise until I obtained condition 4)a) above (both lit) then I turned the screw clockwise until one light went out + 1/8 turn of the screw. This assures the throttle is as close to actually closed as possible when the sensor indicates that condition to the computer. (Thus giving you the smoothest transition on/off idle.)

Sensor Diagram:
----
| |(A) (A) = Top
| -- | (B) = Bottom Right
- - (C) = Bottom Left
| |
(C)| | | |(B)
| |
--------

Note you can also use two DC volt meters; connect the positive leads of both volt meters to terminal A. Connect the negative terminal of one meter to C and the negative of the other to B. If you have basic point type probes on your volt meters, they will slide nicely into the connector and you don't need to build the test lamps. Put them into the position for measuring DC 12 volts (...or more) and away you go.

 

[QUOTE=RacerJason;9164742]I'll look for my diagram at home but...


RacerJason, that would be much appreciated.

Pete

 

[QUOTE=RacerJason;9164742]I'll look for my diagram at home but...

RacerJason, would this be it...or is it another tester for CODES.

http://www.teamfc3s.org/info/article...odes/main.html

Pete

 

That is the equivalent of today's OBDII code scanners, not what you're after. Still looking...