REVISED: CRUISE CONTROL SURGE INFORMATION

Subject: CRUISE CONTROL SURGE ON 1982 FIREBIRDS WITH 5.OL V-8 ENGINES

Some 1982 Firebirds with 5.OL V-8 (4-BBL. and EFI) engines may exhibit varying degrees of speed oscillation (surge) after engaging the cruise control.

A new transducer has been released for vehicles equipped with the engines noted above and entered production on approximately June 15, 1982.

Vehicles exhibiting this condition may be corrected by performing the following adjustments:

1. Check cruise control cable for correct routing and proper adjustment:

4-BBL: With throttle completely closed (ignition off and fast idle cam off), adjust cable assembly jam nuts until there is a 1.0 mm of clearance between the stud pin and the end of the slot (page 9-8, 1982 Firebird Service Manual).

EFI: With cable installed to cable bracket and TBI lever, install cable to servo bracket. Using third ball only on servo chain, install servo chain on cable. With throttle competely closed (ignition off and fast idle cam off) adjust cable jam nuts until cable sleeve at TBI is tight but not holding throttle open. Tighten jam nuts to specified torque. Then pull rubber boot over washer on cable (page 9-9, 1982 Firebird Service Manual).

2. Remove orifice cup from the larger of the two (2) ports on the front of the transducer (Port A).

3. Adjust variable orifice located on the side of the transducer by loosening the lock nut and turning the port inward 1/2 turn to maintain engagement speed accuracy.

4. Evaluate vehicle for cruise control stability and engagement speed accuracy. If additional adjustment to variable orifice is required, see "Engagement-Cruising Speed Zeroing" procedure in 1982 Firebird Shop Manual (page 9-1).

5. If oscillation still exists, remove and replace cruise control transducer with a new transducer (part number 25031907). Zone approval is required.

WARRANTY INFORMATION

Steps 1 thru 4 Step 5 Labor Operation T3085 R1160 Labor Time .3 Hr. .3 Hr. Trouble Code 26 54

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.