Throttle position sensor
- Thread starter Djk96
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Yo Djk96,
I assume it's a 94 Bronco, so;
Test, Operational Description & Parameters
Source: by Ryan M (Fireguy50) at http://www.fuelinjectedford.com/page30.html
Note, Only very old TPSs require or allow adjustment. Modern EECs adapt automatically to the TPS output at startup, as described below. BEFORE attempting to adjust the TPS idle voltage, confirm that the throttle stop ***** has not been tampered with!
Throttle Position Sensor (TPS) Function & Diagnosis TSB 94-26-4 for 93-95; DTC 121,122,123, 124, 125, OBD II Code P0122 & P0123; "...The following is a list of vehicle symptoms which have been associated with the TPS, but can also be related to other vehicle components. Check engine light, Stalls, quits, hesitation/stumble, fast idle; To minimize the replacement of good components, be advised that the following non-EEC areas may be the issue: Excessive blow-by, PCV malfunction, Vacuum leaks, Fuel pressure, Throttle sticking or linkage binding."
Upper case is by Ford, not me;
"MANY VOLTMETERS WILL AUTOMATICALLY CHANGE RANGES WHEN MEASURING TPS OUTPUT FROM IDLE TO WOT. WHEN A VOLTMETER IS USED TO MEASURE TPS OUTPUT FROM IDLE TO WOT, THE METER SCALES OR CHANGES RANGES AUTOMATICALLY. THERE MAY BE AN ERRONEOUS METER DISPLAY UNTIL THE VOLTMETER HAS LOCKED TO THE APPROPRIATE VOLTAGE READING. THE ERRONEOUS METER DISPLAY DOES NOT REPRESENT A DEFECTIVE TPS. NOTE: IT IS RECOMMENDED THAT THE "RANGE LOCK" FEATURE ON MANY METERS BE SET FOR CHECKING TPS VOLTAGE..."
I assume it's a 94 Bronco, so;
Test, Operational Description & Parameters
Source: by Ryan M (Fireguy50) at http://www.fuelinjectedford.com/page30.html
Note, Only very old TPSs require or allow adjustment. Modern EECs adapt automatically to the TPS output at startup, as described below. BEFORE attempting to adjust the TPS idle voltage, confirm that the throttle stop ***** has not been tampered with!
Throttle Position Sensor (TPS) Function & Diagnosis TSB 94-26-4 for 93-95; DTC 121,122,123, 124, 125, OBD II Code P0122 & P0123; "...The following is a list of vehicle symptoms which have been associated with the TPS, but can also be related to other vehicle components. Check engine light, Stalls, quits, hesitation/stumble, fast idle; To minimize the replacement of good components, be advised that the following non-EEC areas may be the issue: Excessive blow-by, PCV malfunction, Vacuum leaks, Fuel pressure, Throttle sticking or linkage binding."
Upper case is by Ford, not me;
"MANY VOLTMETERS WILL AUTOMATICALLY CHANGE RANGES WHEN MEASURING TPS OUTPUT FROM IDLE TO WOT. WHEN A VOLTMETER IS USED TO MEASURE TPS OUTPUT FROM IDLE TO WOT, THE METER SCALES OR CHANGES RANGES AUTOMATICALLY. THERE MAY BE AN ERRONEOUS METER DISPLAY UNTIL THE VOLTMETER HAS LOCKED TO THE APPROPRIATE VOLTAGE READING. THE ERRONEOUS METER DISPLAY DOES NOT REPRESENT A DEFECTIVE TPS. NOTE: IT IS RECOMMENDED THAT THE "RANGE LOCK" FEATURE ON MANY METERS BE SET FOR CHECKING TPS VOLTAGE..."
