Throttle Position Sensor for 1998-2004 24v.
Fits automatic and Manual
Replaces 53031575, 53031575AH, 3970084, AP63428, 53031576, 53031576AD, 3970085, AP63427
These commercial grade Sensors with a 1 year warranty. They are a
direct bolt in replacement on a 24V 98.5-03
and some 04 trucks. 04 look at the engine bay picture Take notice to
the large
black plastic cover in the center of the picture. That is the APPS
assembly, if
you have that then this Sensor will work for you.
Replacement TPS
If your Vehicle has this my TPS /APPS will fit
The most common problem when a APPS sensor is failing is
a "Dead Pedal" You'll be driving down the road and hit the go pedal and
NOTHING. A real annoying problem. The most common codes are the
0121,0122,222,223 code.
Another issue is a surging or a bucking, this often times will not throw
any codes.
The other cause of the "Dead Pedal' is a failing vp-44 injector pump.
Common codes for Injector pump are 0215,0216,1688,1689
These commercial grade Sensors are a direct bolt in replacement on a 24V
98.5-03
and some 04 trucks. 04 look at the engine bay picture Take notice to
the large
black plastic cover in the center of the picture. That is the APPS
assembly, if
you have that then this Sensor will work for you.
Directions below:
APPS SENSOR INSTALLATION INSTRUCTIONS
1. Disconnect battery cables
2. Remove the plastic APPS cover.
Next remove the six, 10 mm headed bolts that hold the bellcrank
assembly on.
When that is removed, you will see the sensor on the back. A T20 Torx
is
needed here.
*Caution, these screws have loctite on them. So make sure that the bit
is
engaged fully into the screw head, so they do not strip, or you will
need to use
visegrips to remove them. NOTE: 2 new screws are provided.
3. After the old sensor is removed, take the new sensor and look at the
side
that bolts to the bracket. In the center, you will see the slot that
engages in
the tang of the bellcrank shaft. Next, line up the slot with the tang
and push
the sensor onto the mounting surface.
*If a sensor does not mate flat to the mounting surface, the slot is not
engaged
properly, try again.
4. When you are sure the tang is engaged properly, rotate the sensor
clockwise,
until the screw holes are aligned, and start the screws. Just
before the
screws are tight, twist the sensor clockwise and tighten the screws.
5. Remount the bellcrank assembly to the bracket.
6. Next procedure is setting the idle voltage, using a digital
voltmeter, and
turning
the idle stop screw clockwise.
*Caution, the screw has loctite on it from factory. You will need a T20
Torx
bit with a ¼ inch ratchet to turn it. Make sure the bit is engaged fully
into
the head before attempting to turn. Be careful not to strip the torx
head!
*If needed, a propane torch, VERY CAREFULLY, can be used to heat the
screw; this
will soften the loctite and allow it to break free. Only heat it for a
couple
seconds at a time and attempt to turn clockwise.
Next look on the back of the 6 pin electrical connector, it is numbered.
With
the paperclip provided insert it into the back of the connector PIN #
3
(Green wire). Or insert it into the back of the factory plug(light blue
wire
w/black tracer) just make sure its PIN #3. This will get hooked
to the
positive lead of the voltmeter. The ground lead can be hooked to the
ground
terminal of the battery. Turn your voltmeter to the low voltage DC
scale. Make
sure paperclip does not contact ground. Proceed to plug the sensor into
the
factory harness and then hook the batteries up. Turn the key to the ON
position.
Now read the voltmeter, it should read .580-.670. Next
turn the
idle stop screw clockwise, NOTE you may turn for a little bit before the
voltage
actually rises. As soon as the voltage begins to rise, turn the screw
backwards
½ turn and you are done with the idle screw.
7. Turn key off, disconnect voltmeter, and pull paperclip out of
pin #3.
8. Last procedure, turn key ON, press accelerator petal slowly to the
floor and
then
let up slowly. Turn key off. Repeat this 2 more times and you are done.
Plug N Play on this one 
