
SYMPTOM — MUFFLER EXPLOSION (AFTER FIRE)
-Rich Fuel Mixture-Misfire
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-22)
Normal code
CHECK IGNITION TIMING
1. Short both terminals of the
check connector.
2. Check ignition timing.
STD: 10° BTDC
(w/short terminals of the
check connector)
OK
CHECK COLD START INJECTOR
(See page FI-49)
OK
CHECK INJECTORS
OK
CHECK SPARK PLUGS
Max. allowable gap: 1.4 mm (0.055 in.)
Precaution: Never attempt to adjust gap
on used platinum tipped spark plug.
— Note —
Check compression pressure if necessary.
(See page EM-6)
OK
CHECK EFI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER
Malfunction
code(s)
Diagnostic code(s) (See page FI-25)
NO
Ignition system (See page IG-2)
BAD
1. Cold start injector
2. Start injector time switch
(See page FI-71)
BAD
Injectors — leakage
NO
1. Spark plug
2. Compression pressure
Limit: 9.0 kgf/cm² (128 psi, 883 kPa)
at 250 rpm
BAD
1. Throttle position sensor
2. Injection signal
(1) Injector wiring
(2) Resistor
(3) ECU
3. Oxygen sensor