Air Flow Meter/Sensor
Ignition TimingBase 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)
Coolant Temperature Switch [4]
Closed 226° F (108° C)
Open 239° F (115° C)
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 Adjustment Voltage
At Curb Idle 0.48 - 0.52 Volts
Throttle Position Sensor Resistance
Varies between 3.5 - 6.5 KOhms
[1] Refer to ADJUSTMENT PROCEDURES.
[2] Not adjustable.
[3] California Only.
[4] A/C Only.