Engine/Transmission (1994 - 1998) tps cleaned

[ebrooker]

I cleaned my tps and checked the voltage. At idle the voltage is . 6 and at full throttle my voltage is at 3. 6. I loosened the bolts and turned the tps as far as I could turn it and this is the results I got. Are both of the voltages low? If so what would be some of your all's suggestions for fixing this. Also I need a diesel mechanic in central kentucky. I live in frankfort if anyone knows the area.

 

[shendren]

i would also take the wires going to the tps out of the harness back about 2-3 ft. that solved my problems.



this was taken from dodgeram.org.





TPS Adjustment

The throttle position sensor, shift lever, and throttle valve cable are critical to proper operation of the transmission. If one or more of these are out of adjustment or if the TPS is noisy, shifting will be erratic. Before performing any adjustments, check the transmission fluid level and sniff the fluid. Do not make any adjustments until the fluid level is correct, and burned fluid has been replaced.

The service manual says to adjust for 0. 8-1. 2V at idle. On many trucks, this voltage is too low, resulting in TCC chatter at moderate throttle loads. The TPS is not officially adjustable but the mounting holes are slotted and the body can be rotated slightly. Adjustment is relatively easy, and requires only a digital voltmeter and a few hand tools. A little adjustment goes a long way...

TPS wire color code:

• Black = ground

• Orange/dark blue stripe (center pin) = signal

• Purple/white stripe = 5V power

Testing and adjusting the TPS:

1. With the key "OFF", unplug the connector from the TPS.

2. Turn the key "on" and insert DVM probes into the connector to reach the connector pins. Short pieces of wire or paper clips can be used to extend the DVM probes for reaching into the connectors.

3. Read from the purple wire to the black wire (these should be the outside pins). Power should be 5V with the key "on".

4. Turn the key "off" and plug the connector back onto the TPS

5. Insert the leads from the digital volt meter into the back of the TPS connector. The DVM negative probe goes into the back of the connector cavity with the black wire. The positive DVM probe goes into the back of the connector cavity with the orange signal wire.

NOTE: Push the probes into the rear of the connector until the probe tips reach the metal connector pins.

6. Loosen the TPS mounting screws

7. With the engine off and key on: Adjust the TPS position for 1. 2 to 1. 5V on the signal wire with the throttle at the idle position - more voltage makes more TC clutch pressure, too much will set a fault code. Often, adjusting for 1. 4 to 1. 5V at idle will cure TC clutch chatter under light load conditions. NOTE: The factory setting is 1. 2V max, so proceed carefully.

8. Tighten the TPS screws, slowly open the throttle to the WOT position and then return return to idle. Watch for voltage jumps - the voltage should change smoothly from the idle value to at least 3. 5V at WOT (5 volts is all you should be able to get).

 

[illflem]

Sometimes if you can't get the required voltage out of the tps by rotating it you need to remove the metal bushings that the hold down screws go though then elongate the holes with a round file. A little goes a long way.