Idle Speed Too Low When Warm

Depending on the low idle condition and time of occurance check the following:

1. IDLE SPEED BELOW SPECIFIED RPM
a. Electronic Air Control Valve
b. Idle adjusting screw
c. Fast idle valve
d. Throttle valve
e. Throttle cable

2. IDLE SPEED DOES NOT INCREASE AFTER INITIAL START-UP
a. Electronic Air Control Valve

3. IDLE SPEED DROPS IN GEAR (Automatic Transmission only)
a. Automatic transmission shift position signal
b. Electronic Air Control Valve

4. IDLE SPEED DROPS WHEN TURNING STEERING WHEEL
a. Power steering oil pressure signal
b. Electronic Air Control Valve

5. IDLE SPEED DROPS WITH A/C ON
a. A/C signal missing
b. Electronic Air Control Valve

NOTE: Sub-systems are ordered according to greatest likelihood of failure and should be checked in the order that they are listed.