Checking/adjusting throttle position sensor
01-26-2006, 12:00 AM
#2
2nd Gear Member
Join Date: Dec 2005
Location: Washington
Posts: 270
RE: Checking/adjusting throttle position sensor
92BOOSTED
3rd Gear Member
Posts: 444
Joined: 7/18/2004
Status: offline Did you set the voltage when you put it on?
With the key on engine off, grab a voltage meter and check (i believe) the black and green wires.Black being neg. side.
You can adjust this TPS by the two screws on top.
You want the voltage to be between .96 and .98 volts. You might have to pull it off and open the holes up a little bit to achieve
the desired voltage but it will work better for you.
Rye
_____________________________
92 coupe
S/C engine is no more.
Building now, 351W sportsman block, lightning pistons,
trickflow stage 2 cam, trickflow trackheat heads, performer RPM airgap int, shorty headers, steel billet flywheel, tremec 3550,
Thats all i have so far...
3rd Gear Member
Posts: 444
Joined: 7/18/2004
Status: offline Did you set the voltage when you put it on?
With the key on engine off, grab a voltage meter and check (i believe) the black and green wires.Black being neg. side.
You can adjust this TPS by the two screws on top.
You want the voltage to be between .96 and .98 volts. You might have to pull it off and open the holes up a little bit to achieve
the desired voltage but it will work better for you.
Rye
_____________________________
92 coupe
S/C engine is no more.
Building now, 351W sportsman block, lightning pistons,
trickflow stage 2 cam, trickflow trackheat heads, performer RPM airgap int, shorty headers, steel billet flywheel, tremec 3550,
Thats all i have so far...
01-26-2006, 12:44 AM
#4
2nd Gear Member
Join Date: Dec 2005
Location: Washington
Posts: 270
RE: Checking/adjusting throttle position sensor
no prob. you got me searchin for the answer and i know in the past i've come across many different answers to your question but most of them are very similar. i decided to pull out my "Official Ford 5.0 Mustang Technical Reference & Performance Handbook" and see what that has to say about the TPS. Here is a direct quote from the book.
Throttle Position Sensor
"The throttle position sensor is housed on top of the throttle body. This rotary-potentiometer-based device sends a voltage signal to EEC to indicate the position (and rate of change of position) of the throttle shaft. Ford service literature shows that a five-oh's throttle position sensor's signals range between .6 and 4.585 volts, the lower number indicates that the throttle is closed and the higher signaling wide-open throttle. With the engine off and the ignition key switched on, a digital voltmeter connected across the sensor's wires should read .85-1 volt. At idle, a reading of .98-1 volt is considered desirable for performance service. A TPS setting of 1 volt at idle produces 4.6-4.8 volts at wide-open throttle.
Adjustment involves loosening the pair of screws that attach the sensor to the throttle housing and rotating the sensor until the meter reading is corrected. The meter's positive lead connects to the sensor's green wire and the negative lead goes to the black wire. Due to variations in production equipment, the holes in the sensor housing may require elongation before it becomes possible to obtain the desired reading. For reference, the 1994-1995 TPS uses different-colored wires, and the hold-down holes in the sensor housing are not accessible as on previous models. In July 1989, Ford issued a Technical Service Bulletin covering hard-to-remove throttle position sensor mounting screws."
Courtesy of Al Kirschenbaum
Throttle Position Sensor
"The throttle position sensor is housed on top of the throttle body. This rotary-potentiometer-based device sends a voltage signal to EEC to indicate the position (and rate of change of position) of the throttle shaft. Ford service literature shows that a five-oh's throttle position sensor's signals range between .6 and 4.585 volts, the lower number indicates that the throttle is closed and the higher signaling wide-open throttle. With the engine off and the ignition key switched on, a digital voltmeter connected across the sensor's wires should read .85-1 volt. At idle, a reading of .98-1 volt is considered desirable for performance service. A TPS setting of 1 volt at idle produces 4.6-4.8 volts at wide-open throttle.
Adjustment involves loosening the pair of screws that attach the sensor to the throttle housing and rotating the sensor until the meter reading is corrected. The meter's positive lead connects to the sensor's green wire and the negative lead goes to the black wire. Due to variations in production equipment, the holes in the sensor housing may require elongation before it becomes possible to obtain the desired reading. For reference, the 1994-1995 TPS uses different-colored wires, and the hold-down holes in the sensor housing are not accessible as on previous models. In July 1989, Ford issued a Technical Service Bulletin covering hard-to-remove throttle position sensor mounting screws."
Courtesy of Al Kirschenbaum
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