LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2000 >> GS 400 >> Repair and Diagnosis >> Engine Performance >> Engine Controls - On-Vehicle Adjustments >> Idle Speed & Mixture >> Idle Speed >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Idle Speed: Notes

NOTE: Idle speed is controlled by Engine Control Module (ECM) and is not adjustable. Check idle speed with air cleaner installed, all air induction system hoses and vacuum lines connected, electronic fuel injection system wiring connectors properly installed, transmission/transaxle in Neutral, ignition timing properly set, A/C and all accessories off, and engine at normal operating temperature.