Engine - Surge/Stall/Poor Idle/AM Radio Noise
Article No. 85-9-28SURGE, STALL - EEC IV ALTERNATOR REGULATOR
POOR IDLE - EEC IV - ALTERNATOR REGULATOR
LOSS OF POWER - EEC IV - ALTERNATOR REGULATOR
AM RADIO NOISE - ALTERNATOR REGULATOR
FORD 1984-85 TEMPO
LINCOLN-MERCURY 1984-85 TOPAZ
Some EEC IV vehicles have experienced the subject driveability conditions usually during high ambient temperatures and/or high underhood temperatures. It has also been shown to be an intermittent condition between hot and cold engine compartment temperature. The symptoms may also be induced by repeated engine cranking.
The condition may be the result of the voltage regulator causing RF interference to interact with the EEC IV processor.
^ Verify excessive high frequency noise on the low end of the AM radio band.
^ Turn engine OFF. Disconnect the voltage regulator.
^ Start engine. Allow the fuel charging system to stabilize and verify that the subject concerns have been eliminated and the noise on the AM radio band has been significantly diminished.
^ Stop engine. Reconnect the voltage regulator. Restart the engine and verify the return of the symptoms. If the symptoms return, replace the voltage regulator.
NOTE: You may have to increase the temperature of the voltage regulator to reproduce the subject symptoms.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"