Rough Or Incorrect Idle: Vitara
- Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
- Faulty spark plugs. See IGNITION CHECKS IGNITION CHECKS in BASIC DIAGNOSTIC PROCEDURES article.
- Faulty ignition coil. See IGNITION CHECKS in BASIC DIAGNOSTIC PROCEDURES article.
- With A/C on. Check A/C signal circuit. See A/C SIGNALS CIRCUIT CHECK under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
- When steering wheel is turned. Check power steering pressure switch. See POWER STEERING PRESSURE SWITCH CIRCUIT CHECK under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
- Fuel pressure out of specification. See FUEL PRESSURE under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
- Faulty fuel injector(s). See B-2: FUEL INJECTOR CIRCUIT INSPECTION under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
- Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
- Idle Air Control (IAC) system. See B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
- Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
- Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
- Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
- Check for low engine compression. See MECHANICAL INSPECTION under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.