EXPERTEC TSB (41-65-22)

Publication date: 1994-08-12
Reference number: 41-65-22

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 41-65-22, Date of Issue: 08/12/94

SMU - SECTION 4 - REVISED - CONTROLLED IDLE SPEED SPECS.

Model(s): 1994 Chevrolet & Gmc Truck Light Duty Trucks

1994 Oldsmobile Bravada W/Gasoline Engines

Bulletin No.: Chevrolet 41-65-22 Oldsmobile 41-65-22

Date: 08/12/1994

REVISION: 08/31/94

SERVICE INFORMATION

THIS BULLETIN IS BEING REVISED TO CORRECT INFORMATION IN THE MINIMUM IDLE SPEED (MARK ENGINE 7.4 LITER) SECTION.

THIS SERVICE BULLETIN SUPERSEDES SERVICE MANUAL INFORMATION FOR THE CONTROLLED IDLE SPEED SPECIFICATION ON PAGE 4-3 OF THE DRIVEABILITY, EMISSIONS, AND ELECTRICAL DIAGNOSIS MANUAL.

SUBJECT

SERVICE MANUAL UPDATE-SECTION 4-REVISED CONTROLLED IDLE SPEED SPECIFICATION

MODELS

1994 CHEVROLET AND GMC TRUCK LIGHT DUTY TRUCKS

1994 OLDSMOBILE BRAVADA WITH GASOLINE ENGINES

1994 CONTROLLED IDLE SPEED

NOTE: ENGINE AT OPERATING TEMPERATURE 92C TO 104C (196F TO 222F)

ENGINE

TRANS A=AUTOMATIC M=MANUAL

GEAR ⁽¹⁾ (DRIVE/NEUTRAL

IDLE SPEED (RPM)

IAC COUNTS ⁽²⁾

OPEN/CLOSED LOOP ⁽³⁾

2.2L (MFI)

DRIVE

890+25

15-40

S-TRK

NEUTRAL

950+25

15-40

4.3L (TBI

DRIVE

650+25

5-30

S/T

NEUTRAL

700+25

5-30

4.3L S/T

DRIVE

625+25

5-30

CENTRAL MFI PICKUP

NEUTRAL

625+25

5-30

4.3L S/T

DRIVE

600+25

5-30

CENTRAL MFI UTILITY

NEUTRAL

650+25

5-30

4.3L (TBI)

DRIVE

537+25

5-30

M/L

NEUTRAL

537+25

5-30

4.3L M-VAN

DRIVE

550+25

5-30

CENTRAL MFI

NEUTRAL

550+25

5-30

4.23L L-VAN

DRIVE

625+25

5-30

CENTRAL MFI

NEUTRAL

625+25

5-30

4.3L (TBI)

DRIVE

580+25

5-30

UNDER 8500 C/K-TRK

NEUTRAL

650+25

5-30

5.0L (TBI

DRIVE

550+25

5-30

C/K-TRK

NEUTRAL

650+25

5-30

5.7L C/K

DRIVE

525+25

5-30

UNDER 8500

NEUTRAL

650+25

5-30

4.3L (TBI)

DRIVE

537+25

5-30

UNDER 8500 G-VAN

NAUTRAL

5.0L (TBI)

DRIVE

525+25

5-30

G-VAN

NEUTRAL

5.7L G-VAN

DRIVE

550+25

5-30

UNDER 8500

NEUTRAL

4.3L (TBI)

DRIVE

650+25

5-30

OVER 8500 C/K/P

NEUTRAL

4.3L (TBI)

DRIVE

650+25

5-30

OVER 8500 G-VAN

NEUTRAL

5.7L C/K/P

DRIVE

550+25

5-30

OVER 8500

NEUTRAL

700+25

5-30

5.7L G-VAN

DRIVE

550+25

5-30

OVER 8500

NEUTRAL

7.4L C/K

DRIVE

675+25

5-30

NEUTRAL

750+25

5-30

7.4L G-VAN

DRIVE

625+25

5-30

NEUTRAL

625+25

5-30

⁽¹⁾	ON MANUAL TRANSMISSION VEHICLES, THE TECH 1 WILL READ RDL IN NEUTRAL.

⁽²⁾	IF THE ENGINE HAS LESS THAN 500 MILES OR IS CHECKED AT ALTITUDES ABOVE 1,500 FEET, THE IDLE RPM WITH A SEATED IAC VALVE SHOULD BE LOWER THAN VALUES ABOVE.

⁽³⁾	LET ENGINE IDLE UNTIL PROPER FUEL CONTROL STATUS (OPEN/CLOSED LOOP") IS REACHED.