S10/T10 Blazer 4WD V6-262 4.3L (1989)
Idle Speed: Specifications
Minimum Air Rate
CONTROLLED IDLE SPEED
Transmission
Gear
Idle Speed
IAC Counts [1]
Open/Closed Loop [2]
Man.
N
500-550
2-12
CL
Auto.
D
500-550
2-20
CL
[1] Add 2 counts for engines with less than 500 miles. Add 2 count 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
450 +/- 50
CL
Auto.
D
400 +/- 50
CL
Auto. [2]
N
475 +/- 50
CL
[1] Let engine idle until proper fuel control status is reached (open/closed loop).
[2] 4.3L engine ST series only
TIGHTENING SPECIFICATIONS
EGR valve to manifold...............................................................................................................................................................................................15 ft. lbs.
Oxygen sensor............................................................................................................................................................................................................30 ft. lbs.
TBI Unit to manifold..................................................................................................................................................................................................12 ft. lbs.
