FI/EFI System — Symptom — Muffler Explosion (After Fire) -Rich Fuel Mixture-Misfire, page 19

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