Toyota Land Cruiser 1988 Repair Manual page 143

Fl-12 EFI SYSTEM - Troubleshooting
SYMPTOM -ENGINE OFTEN STALLS
CHECK DIAGNOSIS SYSTEM
Diagnostic code(s) (See pages Fl-24, 25)
Check for output of diagnostic code. Malfunction
(See page Fl-21) code(s)
~
Normal code
CHECK FOR VACUUM lEAKS IN AIR 1. Oil filler cap
INTAKE liNE BAD 2. Oil dipstick
3. Hose connections
4. PCV hoses
5. EGA system- EGA valve stays open
~OK
CHECK FUEl SUPPlY TO INJECTOR 1 . Fuel line - Leakage - Deformation
1. Fuel in tank BAD 2. Fuses
2. Fuel pressure in fuel line 3. Fuel pump (See page Fl-46)
(1) Short terminals
+
B and FP of the 4. Fuel filter
check connector. 5. Fuel pressure regulator (See page Fl-55)
(2) Fuel pressure at fuel hose of fuel
filter can be felt. (See page Fl-47)
i
OK
CHECK AIR FilTER ElEMENT Element - Clean or replace
!
OK
BAD
CHECK IDlE SPEED ISC system
Standard: 650 rpm BAD (1) Wiring connections
(2) ISC valve (See page Fl-71)
(3) ECU (test by substitution)
!
OK
CHECK IGNITION TIMING Ignition timing- Adjust (See page IG-11)
1. Short terminals TE1 and E1 of the
NO
service connector.
2. Check ignition timing.
Standard: 7° BTDC @ idle
(w/ short circuited
TE1 and E1)
!
OK
CHECK SPARK PlUGS 1. Spark plugs
Plug gap:
0.8 mm (0.031 in.) NO 2. Compression pressure
NOTE: Check compression pressure and Minimum: 8.0 kg/cm
2
valve clearance if necessary. (114 psi, 785 kpa)
at 200 rpm
3. Valve Clearance (Hot)
Standard:
IN
0.20 mm (0.008 in.)
EX 0.35 mm (0.014 in.)
~OK
CONTINUED ON PAGE Fl-13