Toyota Supra 1990 Manual page 196

FI-22 EFI SYSTEM - Troubleshooting
10K
CONTINUED FROM PAGE FI-21
CHECK SPARK PLUGS
Plug gap: 7M-GE 1.1 mm (0.043 in.)
7M-GTE 0.8 mm (0.031 in.)
- HINT-
Check compression pressure and valve
clearance if necessary.
OK
CHECK EFI ELECTRONIC CIRCUT
USING VOLT/OHMMETER
(See pages F 1-30,49)
NO
BAD
1. Spark plugs
2. Compression pressure
Minimum: 9.0 kg/cm2
(128 psi, 883 kPa)
at 250 rpm
3. Valve clearance
Standard: IN
EX
0.15 - 0.25 mm
(0.006 - 0.010 in.)
0.20 - 0.30 mm
(0.008 - 0.012 in.)
1. Wiring connection
2. Power to ECU
(1) Fusible links
(2) Fuses
(3) EF I main relay
3. Air flow meter
4. Water temp. sensor
5. Air temp. sensor
6. Throttle position sensor
7. Injection signal circuit
(1) I njector wiring
(2) Resistor (7M-GTE)
(3) ECU