Computers and Control Systems

TIMING:

Base Ignition Timing 10° BTDC At Idle [1]
Advance Ignition Timing 9 - 10° BTDC At Idle [1]

[1] Refer to ADJUSTMENT PROCEDURES.

RESISTANCE:

EGR Gas Temperature Sensor [2]
At 122°F (50°C) 69.4 - 88.5 k ohms
At 212°F (100°C) 11.9 - 14.4 k ohms
At 302°F (150°C) 2.8 - 3.6 k ohms

[2] California only.

Sub-Oxygen Sensor Heater [2]
At 68°F (20°C) 5.1 - 6.3 Ohms

[2] California Only.

Pickup Coil:
G1 and G- pickups 140 - 180 Ohms
G2 and G- pickups 140 - 180 Ohms
NE and G- pickups 180 - 220 Ohms

Coolant Temperature Sensor:
At -4°F (-20°C) 10 - 20 k ohms
At 32°F (0°C) 4 - 7 k ohms
At 68°F (20°C) 2 - 3 k ohms
At 104°F (40°C) 0.9 - 1.3 k ohms
At 140°F (60°C) 0.4 - 0.7 k ohms
At 176°F (80°C) 0.2 - 0.4 k ohms

Idle Speed Control (ISC) Valve:
Between terminals B1 and S1 or S3 10 - 30 Ohms
Between terminals B2 and S2 or S4 10 - 30 Ohms

Throttle Position Sensor:

CLEARANCE BETWEEN BETWEEN TERMINALS RESISTANCE
STOP SCREW AND LEVER

0in. (0mm) VTA - E2 0.2 - 1.2 k ohms
0.016in. (0.40mm) IDL - E2 2.3 k ohms or less
0.030in. (0.75mm) IDL - E2 Infinity
Full Open VTA - E2 3.5 - 10.3 k ohms
-- VC - E2 4.25 - 8.25 k ohms

Air Flow Meter:

BETWEEN TERMINALS RESISTANCE

VS - E2 200 - 600 Ohms
(Measuring plate fully closed)

20 - 1200 Ohms
(Measuring plate fully open)

VC - E2 200 - 400 Ohms

FC - E1 Infinity
(Measuring plate fully closed)

Zero
(Other positions)

THA - E2

At -4°F (-20°C) 10 - 20 k ohms
At 32°F (0°C) 4 - 7 k ohms
At 68°F (20°C) 2 - 3 k ohms
At 104°F (40°C) 0.9 - 1.3 k ohms
At 140°F (60°C) 0.4 - 0.7 k ohms