K 3500 Truck 4WD V8-454 7.4L (1994)
Idle Speed: Specifications
CONTROLLED IDLE SPEED
Transmission
Gear
Idle Speed
IAC Counts [1]
OPEN/CLOSED Loop [2]
Man.
N
750 +/- 25
5-30
CL
Auto
D
675 +/- 25
5-30
CL
[1] On manual transmission vehicles the SCAN tool will display RDL in Neutral. 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 [1]
OPEN/CLOSED Loop [2]
Man.
N
625 +/- 25
CL
Auto.
D
625 +/- 25
CL
[1] If the engine has less than 500 miles or is checked at altitudes above 1500 feet, the idle RPM with a seated IAC valve should be lower than above
values.
[2] Let engine idle until proper fuel control status (OPEN/CLOSED loop) is reached.