1. Throttle position sensor
2. Injection signal circuit
(1) Injector wiring
(2) Fuel cut RPM (See page FI-80)
BAD
FI-18
EFI SYSTEM - Troubleshooting
SYMPTOM - MUFFLER EXPLOSION (AFTER FIRE) -
Rich Fuel Mixture-Misfire
CHECK DIAGNOSIS SYSTEM
Diagnostic code(s) (See pages F1-24, 25)
Check for output of diagnostic code.
Malfunction
(See page F1-21)
code(s)
Normal code
CHECK IGNITION TIMING
Ignition timing — Adjust (See page EM-11)
1. Connect terminals TE1 and El of the
NO
check connector.
2. Check ignition timing.
Standard:
7° BTDC 4 idle
( w/ connected TE1 and
El)
OK
CHECK COLD START INJECTOR
(See page F1-50)
1. Cold start injector (See page F1-50)
2. Cold start injector time switch
(See page FI-72)
BAD
OK
CHECK FUEL PRESSURE
(See page FI-45)
Fuel pressure regulator (See page F1-53)
BAD
OK
CHECK INJECTORS (See page F1-55)
Injectors — Leakage
BAD
OK
CHECK SPARK PLUGS
Plug gap:
0.8 mm (0.031 in.)
HINT:
Check compression pressure and
valve clearance if necessary.
1. Spark plugs
2. Compression pressure
Minimum:
8.0 kg/cm2
(114 psi, 785 kpa)
at 200 rpm
3. Valve clearance (Hot)
NO
Standard: IN 0.20 mm (0.008 in.)
EX 0.35 mm (0.014 in.)
OK
CHECK EFI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER
(See page F1-27)
(3) ECU (See page FI-77)
3. Oxygen sensors (See page FI-75)
Summary of Contents for 3F-E
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