See also:

When to Wax Again
You should polish and wax the car again when water no longer beads on a clean surface but spreads out over a larger area. ...

Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve is controlled by the Engine Control Module (ECM); when the engine coolant temperature is low during idling, the PCSV closes so that evaporated fuel is not taken in ...

Keeping the Condenser Clean
The air conditioner condenser (and engine radiator) should be checked periodically for accumulation of dirt, dead insects, leaves, etc. These can interfere with maximum cooling efficiency. When re ...