CAMPAIGN: NOX EMISSIONS RELOCATE SOURCE OF EGR VACUUM. Oldsmobile Firenza 1982

For 1990-2009 cars

# CAMPAIGN: NOX EMISSIONS RELOCATE SOURCE OF EGR VACUUM

#### MODELS/YEARS 1982 FIRENZA MODELS EQUIPPED WITH A 1.8L ENGINE (VIN CODE G) AND CALIFORNIA EMISSIONS

#### CONDITION

General Motors has determined that some 1982 Firenza models equipped with a 1.8L engine (VIN Code G) and California emissions may be emitting NOX Pollutants in excess of California Emission Standards. This may be attributed to the EGR valve vacuum signal becoming inadequate with increased mileage.

To correct this condition, the source of the EGR vacuum signal is being relocated to provide increased vacuum, thereby reducing the NOX emission level. In addition, the carburetor secondary vacuum break is to be inspected for proper operation.

#### VEHICLES INVOLVED

All 1982 Oldsmobile Firenza models equipped with a 1.8L 4-cylinder engine (VIN CODE G) and California Emissions.

#### DEALER ACTION

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.

Whenever a vehicle subject to this campaign is taken into your used vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Vehicles in dealer used car inventory are to be campaigned in accordance with the guidelines prescribed in this bulletin, prior to resale of the vehicles.

#### SERVICE PROCEDURE

To correct the above condition, install EGR harness modification kit, part number 10045044, using the instruction sheet included in the kit.

#### REPAIR PROCEDURE

1. Inspect and repair secondary vacuum break as required.

a. Check secondary vacuum break for leakage by applying vacuum with hand vacuum device (J 23738) or equivalent. The unit should hold the vacuum level.

b. If repair is indicated, replace unit as described in the 1982 Oldsmobile Firenza Service Manual, page 6C1-10..

c. Check vacuum break for proper setting (27 deg.). If adjustment is required, reset using secondary vacuum break adjusting procedure detailed in Figure 6C1-46 in the 1982 Oldsmobile Firenza Service Manual.

2. Reroute EGR signal line to canister purge port of carburetor to provide earlier signal. Refer to Figure 1.

a. Connect one end of the 18" emission hose to the base of the Y connector.

b. Remove the canister purge control hose from the rear of the carburetor (port B) and connect the other end of the 18" hose to the carburetor port.

c. Reconnect the canister purge control hose to the small nipple of the Y connector.

d. Remove the EGR signal hose from the rear of the carburetor (port C) and install the rubber cap on the carburetor port to seal this signal location.

e. Connect the EGR signal hose to the remaining nipple of the Y connector.

f. Strap the new emission hose to the power steering line or engine wiring harness to prevent it from moving around.

3. Perform a functional check of the revised EGR system using the procedure detailed in the 1982 Oldsmobile Firenza Service Manual, page 6E-44.

4. On automatic transaxle vehicles ONLY, reset initial timing to 8 degrees BTDC using procedure found in the 1982 Oldsmobile Firenza Service Manual, page 6D-19.

5. Remove old tune-up label located on shock tower and install new label, part number 14100959. Do not install the new label over the old label. (Refer to Figure 2).

6. Install Campaign identification label. Each vehicle modified in accordance with the instructions outlined in this Emission Campaign Bulletin will require a Campaign Identification label. Each label provides a space to include the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the radiator upper mounting support and apply the campaign label where it is readily visible.

#### PARTS INFORMATION

Parts required to complete this modification are to be obtained from the Warehousing and Distribution Division of General Motors (WDDGM). To ensure that these parts will be obtained as soon as possible, they should be ordered from WDDGM on a C.I.O. order with NO special instruction codes, but order on an advise code (2). Quantity Per Part Number Vehicle Description ----------- ------- ----------- 10045044 1 EGR Harness Modification Kit

Each kit consists of the following: Tube, connector, strap, cap, label and instruction sheet.

17068548 * Vacuum Break Kit

*1 per vehicle if required. See Repair Procedure.

#### CLAIM INFORMATION

Parts Failed Failure Labor Labor Count Part No. Code Operation Hours ----- --------- ---- --------- ----- 1 10045044 96 V3290 .4

Description:Inspect vacuum break,install EGR harness modification kit and new tune-up label on vehicles equipped with manual transaxle.

1 10045044 96 V3291 .6

Description:Inspect vacuum break,install EGR harness modification kit and new tune-up label, reset timing on vehicles equipped with automatic transaxle.

2 10045044 96 V3292 1.1

Description: Inspect and replace secondary vacuum break,install EGR harness modification kit and new tune-up label on vehicles equipped with manual transaxle.

2 10045044 96 V3293 1.3

Description:Inspect and replace secondary vacuum break, install EGR harness modification kit and new tune-up label, reset timing on vehicles equipped with automatic transaxle.

Parts will be credited at dealer cost plus 30%.

.1 hour for clerical administration may be added to the above operations.

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.