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 | ||
|---|---|---|---|---|
| Violet/Green (4F) | 0 Or 5 | 2 | ||
| Yellow/Black (4N) | Less Than 1 | .3 | ||
|
||||