Coolant Temperature Sensor/Switch (For Computer): Specifications

Ignition Timing
Base Ignition Timing [1]
At idle 5° BTDC
Advance Ignition Timing [2]
At idle 8° BTDC


Air Flow Sensor
At 750 RPM 27 - 33 Hz
At 2,000 RPM 60 - 80 Hz


Barometric Pressure Sensor Voltage
(W/ key on and engine off)
At sea level Approximately 4.0 volts.
At 2,000 ft. Approximately 3.75 volts.
At 4,000 ft. Approximately 3.50 volts.
At 6,000 ft. Approximately 3.25 volts.

Crank Angle Sensor
Approximate Voltage at idle 1.8 - 2.5v (needle fluctuates)

EGR Temperature Sensor Resistance [3]
At 122° F (50° C) 60 - 83 KOhms
At 212° F (100° C) 11 - 14 KOhms

EGR Control Solenoid Valve Resistance [3]
At 68° F (20° C) 36 - 44 Ohms

Engine Coolant Temperature Sensor Resistance
At 68° F (20° C) 2.5K Ohms
At 176° F (80° C) 300 Ohms

Fuel Injector Coil Resistance
At 68° F (20° C) 13 - 16 Ohms

Idle Speed Control Servo Resistance
At 68° F (20° C) 28 - 33 Ohms

Intake Air Temperature Sensor Resistance
At 68° F (20° C) 2.7 KOhms
At 176° F (80° C) 400 Ohms

Purge Control Solenoid Valve Resistance
At 68° F (20° C) 36 - 44 Ohms


Throttle Position Sensor
TPS Output @ curb idle 0.48-0.52v
Resistance Approx 0.5k ohm smoothly increasing to 3.5K-6.5k ohm



[1] Refer to ADJUSTMENT PROCEDURES.
[2] Not adjustable.
[3] California Only.