FI-16 EFI SYSTEM — Troubleshooting SYMPTOM — ROUGH IDLING AND/OR MISSING CHECK DIAGNOSIS SYSTEM Check for output of diagnostic code. (See page FI-23) Malfunction code(s) Diagnostic code(s) (See page FI-26) Normal code CHECK FOR VACUUM LEAKS IN AIR INTAKE LINE BAD 1. Oil filler cap 2. Oil dipstick 3. Hose connections 4. PCV hoses 5. EGR system — EGR valve stays open OK CHECK AIR FILTER ELEMENT BAD Element — Clean or replace OK CHECK IDLE SPEED STD: 7M-GE 700 rpm 7M-GTE 650 rpm BAD ISC system (1) Wiring connection (2) ISC valve (3) ECU (test by substitution) OK CHECK IGNITION TIMING 1. Connect terminals TE1 and E1 of the check connector. 2. Check ignition timing. STD: 10° BTDC @ idle [w/ connect terminals TE1 and E1] NO Adjust ignition timing (See page IG-20) OK CHECK SPARK PLUGS Plug gap: 7M-GE 1.1 mm (0.043 in.) 7M-GTE 0.8 mm (0.031 in.) —HINT— Check compression pressure and valve clearance if necessary. NO 1. Spark plugs 2. Compression pressure Minimum: 9.0 kg/cm² (128 psi, 883 kPa) at 250 rpm 3. Valve clearance Standard: IN 0.15 — 0.25 mm (0.006 — 0.010 in.) EX 0.2e — 0.30 mm (0.008 — 0.012 in.) OK CONTINUED ON PAGE FI-17