2-16 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
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 leads.
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).
Remove the fuel hose (see Fuel Hose Replacement).
Connect the following parts temporary.
Fuel Pump Lead Connector [A]
Fuel Hose [B]
Special Tool - Fuel Hose: 57001-1607
Start the engine and warm it up thoroughly.
Check the idle speed, using a highly accurate tachometer
1 100 ±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.
While idling the engine, inspect the throttle body vacuum,
using the vacuum gauge [B].
Throttle Body Vacuum
Standard: 40.7 ±1.3 kPa (305 ±10 mmHg) at idle speed