Toyota 4-Runner 1985 Repair Manual page 182

EFI SYSTEM - Troubleshooting
FI-13
SYMPTOM - ENGINE OFTEN STALLS
~ECK
DIAGNOSIS SYSTEM
Diagnostic code (s) (See page FI-25)
l
Check for output of diagnostic code.
Malfunction
(See page F 1-22)
code
~
Normal code
CHECK FOR VACUUM LEAKS IN AIR
1. Hose connections
INTAKE LINE
BAD
2. PCV hoses
3. EG R system - EG R valve stays open
i
OK
CHECK FUEL SUPPLY TO INJECTOR
1. Fuel line - Leakage - Deformation
1 . Fuel in tank
BAD
2. Fuse
2. Fuel pressure in fuel line
3. Circuit opening relay (See page F 1-65)
(1) Short fuel pump check terminals.
4. Fuel pump (See page FI-42)
(2) You can feel fuel pressure at fuel hose
5. Fuel filter
of fuel filter. (See page FI-6)
6. Fuel pressure regulator (See page F 1-49)
1
0K
CHECK AIR FIL TER ELEMENT
Element - Clean or replace
BAD
!OK
CHECK IDLE SPEED
Adjust idle speed
STD: 750
rpm
BAD
~OK
CHECK IGNITION TIMING
Adjust ignition timing
STD:
5°
BTDC at. idle
BAD
(T - E
1
Short Circu it)
~OK
CHECK SPARK PLUGS 1 . Spark plug
Plug gap:
0.8 mm (0.031
in.)
BAD
2. Compression pressure
NOTE:
Limit:
10.0
kg/cm2
(142
psi,
981
kPa)
Check compression pressure if necessary.
at
250
rpm
~OK
CHECK COLD START INJECTOR
1 . Cold start injector
(See page F 1-47) BAD 2. Start injector time switch
(See page F 1-67)
~OK
CONTINUED ON PAGE FI-14