Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Controls - TPS Specifications
1985 Buick Century V6-231 3.8LSECTION Engine Controls - TPS Specifications
85buick08
Bulletin 85-6E-17
Date June '85
Ref.. No. 85-123-6E
SUBJECT: TPS SPECIFICATIONS
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 3.8L Turbo "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
Bulletin 85-6E-17
Date June '85
Ref.. No. 85-123-6E
SUBJECT: TPS SPECIFICATIONS
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 3.8L Turbo "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
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.