Ignition Control Module
Check ignition coil, ECM/PCM and high-tension lead connections. Check secondary coil winding and high-tension lead resistance. Measure voltage between ground and appropriate ECM/PCM terminals. See ECM/PCM TERMINAL IDENTIFICATION table. If all measurements are within specification, and misfire still occurs, replace distributor or ignition coil.
ECM/PCM TERMINAL IDENTIFICATION
| ECM/PCM Wire Color (1) | Closed Throttle Volts | WOT Volts | ||
|---|---|---|---|---|
| Red/White (3B) | Less Than 1 | 1-2 | ||
| White (4F) | 0 Or 5 | 2 | ||
| Yellow/Blue (4G) | 0 Or 5 | 1.5 | ||
| Brown/Yellow (4N) | Less Than 1 | .2 | ||
| Brown (4R) | Less Than 1 | .2 | ||
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