TPS SPECIFICATIONS 1981-1985 SETTINGS

MODELS AFFECTED: ALL GASOLINE ENGINES FROM 1981 THROUGH 1985

Listed below are Throttle Position Sensor (TPS) specifications for all gasoline engines used in 1981 through 1985 Buicks.

VOLTAGE ENGINE VIN CODE SPECS. ** PROCEDURE ------ -------- ----- --------- 1981 ---- Buick 3.8L A .97V High step of fast idle cam Buick 3.8L Turbo "A" Car 3 1.30V High step of fast idle cam Buick 3.8L Turbo "E" Car 3 1.12V High step of fast idle cam Buick 4.1L 4 .56V Stopped at curb idle Chev. 2.8L X .51V Stopped at curb idle Olds. 5.0L Y .46V Stopped at curb idle Pont. 2.5L 5 .51V Stopped at curb idle Pont. 4.3L S .41V ISC retracted at slow idle

1982

Buick 3.0L E .52V ISC retracted at slow idle Buick 3.8L Non-Turbo A .77V High step of fast idle cam Buick 3.8L Turbo "G" Car 3 1.28V High step of fast idle cam Buick 3.8LTurbo "E" Car 3 1.28V High step of fast idle cam Buick 4.1L 4 .97V High step of fast idle cam Chev. 1.8L L4 G .26V ISC retracted at slow idle Chev. 2.8L V-6 X,Z .26V Stopped at curb idle

** +/- .1 - Carbureted Engines; +/- .05 - Fuel Injection Engines

Olds. 5.0L Y .46V Stopped at curb idle Pont. 1.8L O * Pont. 2.5L R .525V Ign. On, Engine Off

1983

Buick 3.8L A .86V HigH step of fast idle cam Buick 3.8L Turbo 3 1.28V HigH step of fast idle cam Buick 3.0L E .51V ISC retracted (min. idle) Buick 4.1L 4 .97V High step of fast idle cam Chev. 2.0L P .525V Curb idle Chev. 2.8L X,Z .26V Curb idle solenoid retracted Olds. 5.0L Y .46V ILC retracted

Pont. 1.8L O * Pont. 2.5L R *

1984

Buick 3.0L E .57V ISC retracted - min auth. Buick 3.8L A .46V ISC retracted - min auth. Buick 3.8L MFI 3 .40 Buick 4.1L 4 .57V ISC retracted - min auth. Buick 3.8L Turbo 9 .40 Pont. 1.8L O,J * Pont. 2.5L R * Chev. 2.0L P .525V Ignition-throttle closed Chev. 2.8L X,Z .30V Throttle kicker retracted Olds 5.0L Y .41V 500 rpm in drive

1985

Pont. 1.8L O,J * Chev. 2.0L P * Pont. 2.5L R,U * Chev. 2.8L X .27V Curb idle Chev. 2.8L MFI W .55V Curb idle or ign."on" engine "off" Buick 3.0L MFI L .50V Buick 3.0L (3 speed) E .57V ISC retracted - min auth. Buick 3.0L (4 speed) E .60V ISC retracted - min auth. Buick 3.8L MFI 3 .40V Curb idle or ign. "on" engine "off" Buick 3.8L A .46V ISC retracted - min auth. Buick 3.8L Turbo 9 .40 Curb idle or ign. "on" engine "off" Olds. 5.0L Y .41V ISC retracted - min auth. (no reset req'd if below .7v)

* Non-adjustable ** +/-.1 - Carbureted Engines; +/-.05 - Fuel Injection Engines

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.