2-16 PERIODIC MAINTENANCE
Connect a vacuum gauge (special tool) and hoses [A] to
the fittings on the throttle body.
Special Tool - Vacuum Gauge: 57001-1369
Connect a highly accurate tachometer [B] to one of the
stick coil primary lead.
Plug the air switching valve hose end [A] and air cleaner
housing fitting [B].
Install the air cleaner housing (see Air Cleaner Housing
Installation in the Fuel System (DFI) chapter).
Connect the following parts temporary.
Fuel Pump Lead Connector [A]
Extension Tube [B]
Special Tool - Extension Tube: 57001-1578
Start the engine and warm it up thoroughly.
Check the idle speed, using a highly accurate tachometer
Standard: 1 300 ±50 r/min (rpm)
If the idle speed is out of the specified range, adjust it with
the adjusting screw (see Idle Speed Adjustment).
Do not measure the idle speed by the tachometer of
the meter unit.
When idling the engine, inspect the throttle body vacuum,
using the vacuum gauge [B].
Standard: 27.3 ±1.333 kPa (205 ±10 mmHg) at idle