Toyota 4-Runner 1985 Repair Manual page 189

FI-20 EFI SYSTEM -
Troubleshooting
SYMPTOM - ENGINE HESITATES AND/OR POOR ACCELERATION
CHECK CLUTCH, BRAKE
..
1. Clutch - Slips
I
BAD
2. Brakes - Drag
~OK
CHECK FOR VACUUM LEAKS IN
1. Hose connections
AIR INTAKE LINE
BAD 2. PCV hoses
3. EG R system - EG R valve stays open
~OK
CHECK AIR FIL TER ELEMENT
1
BAD
Element - Clean or replace
~OK
CHECK DIAGNOSIS SYSTEM
Diagnostic code(s) (See page FI-2S)
Check for output of diagnostic code. Malfunction
(See page FI-22)
code
~
Normal code
CHECK IGNITION SPARK
1. Plug cord
I
-
1. Unplug connectors of injector resistor and BAD
2. High tension cord
cold start injector time switch. 3. Distributor
2. Check by holding spark plug cord 8 - 10 mm 4. Ignition coil, Igniter
(0.31 - 0.39 in.) away from engine block
while engine cranking.
A strong spark should be noted.
~OK
CHECK IGNITION TIMING
Adjust ignition timing
STD:
5° BTDC at
idle
-
(T - E
1
Short Circuit)
BAD
~OK
CHECK FUEL PRESSURE
. .
1. Fuel pump (See page FI-42)
(See page F 1-43)
BAD
2. Fuel filter
3.
Fuel pressure regulator (See page F 1-49)
tOK
CONTINUED ON PAGE FI-21