EFI SYSTEM — Troubleshooting FI-13 SYMPTOM — ENGINE OFTEN STALLS CHECK DIAGNOSIS SYSTEM Check for output of diagnostic code (See page FI-22) Normal code | v CHECK FOR VACUUM LEAKS IN AIR INTAKE LINE | OK | v CHECK FUEL SUPPLY TO INJECTOR 1. Fuel in tank 2. Fuel pressure in fuel line (1) Short fuel pump check terminals. (2) You can feel fuel pressure at fuel hose. (See page FI-45) | OK | v CHECK AIR FILTER ELEMENT | OK | v CHECK IDLE SPEED STD: 650 rpm | OK | v 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 | v 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 | v CHECK COLD START INJECTOR (See page FI-49) | OK CONTINUED ON PAGE FI-14 Malfunction code(s) ————————> Diagnostic code(s) (See page FI-25) BAD ————————> 1. Oil filler cap 2. Oil level gauge 3. Hose connections 4. PCV valve 5. EGR system — EGR valve stays open BAD ————————> 1. Fuel line — leakage — deformation 2. Fuse 3. Circuit opening relay (See page FI-69) 4. Fuel pump (See page FI-44) 5. Fuel filter 6. Fuel pressure regulator (See page FI-52) BAD ————————> Element — clean or replace BAD ————————> ISC system (1) Wiring connection (2) ISC valve (3) ECU (test by substitution) NO ————————> Adjust ignition timing NO ————————> 1. Spark plug 2. Compression pressure Limit: 9.0 kgf/cm² (128 psi, 883 kPa) at 250 rpm BAD ————————> 1. Cold start injector 2. Start injector time switch (See page FI-71)