Bronco L6-300 4.9L VIN Y 1-bbl (1983)
Throttle Position Sensor: Technical Service Bulletins
TPS Mounting Screws - Hard to Remove
THROTTLE POSITION SENSOR-MOUNTING SCREWS HARD TO REMOVE-SERVICE TIP
Article No. 89-14-7
1983-89 CROWN VICTORIA, MUSTANG, TEMPO, THUNDERBIRD 1984-89 ESCORT 1986-89 TAURUS
LINCOLN-MERCURY: 1983-89 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, TOPAZ, TOWN CAR 1984-87 LYNX
1985-89 ALL MERKUR LINES
1983-89 ALL LIGHT TRUCK LINES
All Throttle Position Sensor (TPS) mounting screws have a "Pozidrive" head. The "Pozidrive" head looks a lot like a Phillips screw head.
Use of a Phillips head screwdriver to remove a "Pozidrive" screw will normally result in a rounded or damaged screw head. Many technicians
think it is an overtorqued or "frozen" screw. An adhesive was also used as a thread sealant starting with the 1988 model year. This adhesive
requires still more effort to loosen and remove the screw.
To prevent rounded or damages screw heads when servicing the TPS mounting screws, technicians should always use a # 2 "Pozidrive"
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