Notes On Intermittents

Code EO53 can be caused by:

1. Do not attempt to diagnose Code EO53 unless the customer symptom is stumble, stall, miss or other driveability condition that could be caused by loss of spark, ignition, or fuel.
2. Loss of battery power to "B+" terminal of the distributor.
3. A pick up coil that has an intermittent short, open or poor connection at the module.
4. Check ECM connector for improperly seated terminals and mating to the ECM connector.