Page text (OCR transcript)
EFI SYSTEM — Troubleshooting FI-15
SYMPTOM — ROUGH IDLING AND/OR MISSING
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-22)
Normal code
CHECK FOR VACUUM LEAKS IN AIR
INTAKE LINE
OK
CHECK AIR FILTER ELEMENT
OK
CHECK IDLE SPEED
STD: 650 rpm
OK
CHECK IGNITION TIMING
1. Short both terminals of the
check connector.
2. Check ignition timing.
STD: 10° BTDC
(w/short terminals of the
check connector)
OK
CHECK SPARK PLUGS
Max. allowable gap: 1.4 mm (0.055 in.)
Precaution: Never attempt to adjust gap
on used platinum tipped spark plug.
— Note —
Check compression pressure if necessary.
(See page EM-6)
OK
CHECK COLD START INJECTOR
(See page FI-43)
OK CONTINUED ON PAGE FI-16
Malfunction code(s)
Diagnostic code(s)
(See page FI-25)
BAD
1. Oil filler cap
2. Oil level gauge
3. Hose connections
4. PCV hoses
5. EGR system — EGR valve stays open
BAD
Element — clean or replace
BAD
ISC system
(1) Wiring connection
(2) ISC valve
(3) ECU (test by substitution)
NO
Ignition system
NO
1. Spark plug
2. Compression pressure
Limit: 9.0 kg/cm² (128 psi, 883 kPa)
at 250 rpm
BAD
1. Cold start injector
2. Start injector time switch
(See page FI-71)
