Civic Sedan L4-1590cc 1.6L SOHC (D16A6) MFI (1990)
d. Pressure Regulator
3. PGM-FI Control (ECU) Unit (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system
is in operation.
Self-diagnosis indicator, (LED) blinks (?), will follow associated systems.
Frequent Stalling During Warm Up
SYMPTOM
Frequent Stalling After Warm Up
Check:
1. Idle Control System
a. Electronic Air Control Valve (EACV) (14)
b. Idle Adjusting Screw
2. Fuel Supply
a. Fuel Injector (16)
b. Fuel Filter
c. Fuel Pump
3. Air Intake System
a. Throttle Body
b. Throttle Cable
4. PGM-FI Control (ECU) Unit (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system
is in operation.
Self-diagnosis indicator, (LED) blinks (?), will follow associated systems.
RPM Too High (Warm)
SYMPTOM
RPM Too High When Warm
Check:
1. Idle Control System
a. Hoses and Connections
b. Electronic Air Control Valve (EACV) (14)
c. Idle Adjusting Screw
2. Air Intake System
a. Throttle Control System
b. Throttle Body
c. Throttle Cable
3. Coolant Temperature (TW) Sensor (6)
4. PGM-FI Control (ECU) Unit (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system
is in operation.
Self-diagnosis indicator, (LED) blinks (?), will follow associated systems.
RPM Too Low (Warm)