Symptom Muffler Explosion After Fire Rich Fuel Misfire

Weak Spark Mr2 Mk2

SYMPTOM - ENGINE HESITATES AND/OR POOR ACCELERATION

Poor Acceleration Diesel Engine

OK CONTINUED FROM PAGE FI-23

CHECK SPARK PLUGS

2. Compression pressure (See page EM-25) Minimum (at 250 rpm):

3S-GTE 9.0 kg/cm2

3. Valve clearance (Cold) (See page EM-11 or 15) Standard:

(0.006 - 0.010 in.) EX 0.20 - 0.30 mm (0.008 - 0.012 in.) 5S-FE IN 0.19-0.29 mm

(0.007 - 0.011 in.) EX 0.28 - 0.38 mm (0.011 -0.015 in.)

Standard:

3S-GTE 0.8 mm (0.031 in.) 5S-FE 1.1 mm (0.043 in.) HINT: Check compression pressure and valve clearance if necessary.

NO

OK

CHECK T-VIS VALVE

Check if air control valve is open with engine running at 4,200 rpm above.

2. Vacuum leaks

BAD

OK

CHECK EFI ELECTRONIC CIRCUIT

1. Wiring connections

2. Power to ECU (1 ) Fusible links

Air flow meter (See page FI-131 )

Vacuum sensor (See page FI-170)

5. Water temp, sensor (See page FI-168)

6. Intake air temp, sensor (See page FI-131 or 169)

7. Throttle position sensor (See page FI-134 or 141)

8. Injection signal circuit (1 ) Injector wiring

(2) (3S-GTE) Solenoid resistor (See page FI-159)

(3) ECU (See page FI-176)

USING VOLT/OHMMETER

(See page Fl-33)

BAD

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