TPS SPECIFICATIONS 1981-1985 SETTINGS

VEHICLES AFFECTED: All 1981-1985 Models With Gasoline Engines -----------------------------------------------

Listed below are Throttle Position Sensor (TPS) settings for 1981 through 1985.

VOLTAGE SPEC.(SEE ENGINE VIN CODE NOTE) 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.IL 4 .56V Stopped at curb idle Chev. 1.6L 9 .41V Stopped at curb idle Chev. 2.8L X .51V Stopped at curb idle Chev. 3.8L K .41V ISC retracted at slow idle Chev. 4.4L J .5lV Stopped at curb idle Chev. 5.0L H .56V Stopped at curb idle Chev. 5.7L 8 .56V 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 Pont. 4.9 Turbo T .40V ISC retracted at slow idle Pont. 4.9L Non-Turbo with ESC W 1.0V At 2000 RPM Pont. 4.9L Without ESC Z .35V ISC retracted at slow idle

1982

Buick 3.0L E .54V 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 3.8L Turbo 'E' Car 3 1.28V High step of fast idle cam Buick 4.IL 4 .97V High step of fast idle cam

Chev 1.6L Minimum system C (Fed) .92V High step of fast idle cam Chev. 1.6L Full function C (Calif).40V Stopped at curb idle Chev. 1.8L L4 G .26V ISC retracted at slow idle Chev. 2.8L V-6 X,Z,l .26V Stopped at curb idle Chev. 3.8L V-6 K .36V ISC retracted at slow idle Chev. All V-8 H,7 .51V Stopped at curb idle Olds. 5.OL, 4.3L Y,8 .46V Stopped at curb idle Pont. 1.8L O * Curb idle PonL. 2.SL R,2 .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 .5lV ISC retracted (min. idle) Buick 4.1L 4 .97V High step of fast idle cam Chev. 1.6L C .92V High step of fast idle cam Chev. 2.0L P .525V Curb-idle Chev. 2.8L L,X,Z,1 .26V Curb idle solenoid retracte Chev. 3.8L 9 .36V ISC retracted (min. idle) Chev. 5.0L H,S,7 .51V Curb idle Olds. 5.0L Y .46V ILC retracted Pont. 1.8L O * Curb idle Pont. 2.5L R,2 * Curb idle

1984

Buick 3.0L E .57V ISC retracted - min. auth. Buick 3.8L A .46V ISC retructed - min auth. Buick 3.8L MFI 3 .40V Buick 4.1L 4 .57V ISC retracted - min auth. Buick 3.8L Turbo 9 .40 Pont. 1.8L O,J * Pont. 2.5L R,2 * Chev. 2.0L P .525V Ignition- Throttle closed Chev. 5.0L G,H .48V Curb idle Chev. 3.8L 9 .48V Curb idle Chev. 1.6L C .92V High step of fast idle cam Chev. 2.8L L,X,Z,1 .30V Throttle kicker retracted Olds. 5.0L Y .41V 500 RPM in Drive

1985

Pont. 1.8L O,J * Pont. 2.5L R,U,2 * Chev. 2.OL P * Chev. 2.8L X .27V Curb idle Chev. 2.8L MFI W .55V Curb idle or ignition "on" engine "off"

Chev. 2.8L MFI 9 * 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 ignition 'on' engine 'off' Buick 3.8L A .46V ISC retraced - min auth. Buick 3.8L Turbo 9 .40V Curb idle or ignition 'on' engine 'off'

Olds. 5.0L Y .41V ISC retracted - min auth. no reset req.if below .7V

NOTE: + or - .1 CARBURETED ENGINES + or - .05 FUEL INJECTED ENGINES * Non-adjustable

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.