V 3500 P/U 4WD V8-350 5.7L VIN K TBI (1988)
Transmission
Gear
Idle Speed
IAC Counts [1]
OPEN/CLOSED Loop [2]
Man.
N
600
5-30
OL
Auto
D
500
5-30
OL
[1] Add 2 counts for engines with less than 500 miles. Add 2 counts for every 1000 ft. above sea level.
[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED loop).
MINIMUM IDLE AIR RATE
Transmission
Gear
Engine Speed
OPEN/CLOSED Loop [1]
Man.
N
500 +/- 25
OL
Auto.
D
425 +/- 25
OL
CONTROLLED IDLE SPEED (OVER 8500 GVW)
Transmission
Gear
Idle Speed
IAC Counts [1]
OPEN/CLOSED Loop [2]
Man.
N
650
5-30
OL
Man. [3]
N
600
5-30
OL
Auto
D
550
5-30
OL
[1] Add 2 counts for engines with less than 500 miles. Add 2 counts for every 1000 ft. above sea level.
[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED loop).
[3] Suburban with a single catalytic converter.
MINIMUM IDLE AIR RATE
Transmission
Gear
Engine Speed
OPEN/CLOSED Loop
Man.
N
550 +/- 25
CL
Auto.
D
450 +/- 25
CL
