Engine - Provisions for Altitude Adjustments
Number 83-I-40 Section 6 Date 02/83Subject: PROVISIONS FOR ALTITUDE ADJUSTMENTS - 1983 FEDERAL AND CALIFORNIA PASSENGER VEHICLES EQUIPPED WITH GAS ENGINES
Federal emissions regulations applicable to 1983 model year vehicles contain requirements for vehicles sold for principal use in designated high altitude areas. (See list of designated high altitude areas on last page of this bulletin.) These vehicles must conform to high altitude emissions requirements.
In addition, there are regulations which require manufacturers to provide recommended in-use adjustments to improve performance, when applicable, for vehicles that change principal use after sale from either low to high, or high to low, altitudes.
This bulletin is intended as a guide for determining which vehicles may be legally sold for principal use at high altitude, which vehicles can and must be modified prior to sale if sold for principal use at high altitudes, and which vehicles may be modified after sale for improved performance when principal use is changed from high to low, or low to high, altitudes.
It is critical that vehicles be delivered to the customer with the proper emission system configuration to ensure compliance with applicable emissions regulations and to provide maximum customer satisfaction. Pontiac offers two (2) Federal altitude emissions packages as the following sales codes:
NA5 - Designed for all altitude use when NA6 is not available or low altitude only when NA6 is available.
NA6 - Designed for high altitude use.
Some Pontiac vehicles may be converted from one of these certified configurations to another using this bulletin as a guide. Gasoline engine configurations not shown in this bulletin do not require any modification.
VEHICLE EMISSION INFORMATION UPDATE LABELS
One of the labels identified by part number (shown on the following page) must be affixed to the vehicle whenever a vehicle is adjusted and/or modified using this bulletin.
The label should be ordered as regular parts and accessories through the Warehousing and Distribution Division of General Motors system. When ordering these labels via rapid entry, use order type CSD. Orders also may be placed on a PC66 and mailed directly to WDDGM, 6060 West Bristol Road, Flint, Michigan 48554, attention Ship Direct Department.
The label should be affixed in a readily visible position in the engine compartment and where possible beside the existing Emission Control Information (Tune-Up) label and should not be affixed to any equipment that can be easily detached from the vehicle.
VEHICLE EMISSION CONTROL (TUNE-UP) LABELEXAMPLE:
Prior to installation of this label, the dealer code number and date of modification must be typed (with or without ribbon) or lettered with a ballpoint pen in the space provided.
PART NUMBER 14042590
Low altitude vehicle converted for operation at high altitude prior to sale.
PART NUMBER 14057201
Low altitude in-use vehicle modified for improved performance at high altitude.
PART NUMBER 14055121
High altitude vehicle modified for improved performance at low altitude. (This label applies to in-use as well as prior to sale.)
PRIOR-TO-SALE ADJUSTMENTS VS. IN-USE ADJUSTMENTS
Altitude adjustments on new vehicles prior to delivery to the customer for conformance to high altitude emissions standards are referred to in this bulletin as Prior-To-Sale Adjustments. Altitude adjustments on in-use vehicles for improved performance when there is a change of principal use from high altitude to low altitude or from low altitude to high altitude are referred to as Altitude Performance Adjustments.
The "altitude status" of a particular vehicle may be verified by the Vehicle Emission Control Information (Tune-Up) label. (See Figure 1 on the following page for label interpretations..)
LOW ALTITUDE VEHICLES WHICH MUST BE MODIFIED PRIOR TO SALE FOR CONFORMANCE TO HIGH ALTITUDE EMISSIONS STANDARDS*
Field Modification For
Carline Engine Transmission High Altitude Use
"T" 1000 1.6L (L17) All Install jumper wire from circuit
#450E at ALDL connector to pin #18 on ECM connector.
*The above modifications which must be made prior to sale for conformance to high altitude emissions standards are the same as the in-use modifications which are recommended for improved performance for vehicles that after sale, change their principal use from low altitude to high altitude areas.
HIGH ALTITUDE VEHICLES WHICH MAY BE MODIFIED FOR IMPROVED LOW ALTITUDE PERFORMANCE
Field Modification For
Carline Engine Transmission Low Altitude Use
"T" 1000 1.6L (L17) All Remove circuit #450E from
pin #18 on the ECM connector.
PROCEDURE FOR FABRICATING AND INSTALLING JUMPER WIRE
1. Attach a terminal (part number 12004610) to each end of a three (3) foot length of 16 or 18 gage wire.
2. Connect to pin #18 of the ECM.
3. Route wire along and in front of the dash panel.
4. Connect to ground terminal of the Assembly Line Diagnostic Link (ALDL).
HANDLING OF ALTITUDE ADJUSTMENT EXPENSE (PRIOR TO SALE)
Any required altitude modification on new vehicles prior to delivery to the customer for conformance to emission requirements in the area of principal use are the responsibility of the dealer.
IN-USE
Owners Who Move To High Altitude Counties - Dealers in high altitude areas should encourage owners who have moved to high altitude counties to have the Altitude Performance Adjustments performed on their vehicles as outlined in this bulletin. These modifications are considered an owner maintenance expense.
Owners Who Move From High Altitude Counties - Dealers should advise owners moving to low altitude areas that they should have the Altitude Performance Adjustments performed on their vehicles as outlined in this bulletin. These modifications are considered an owner maintenance expense.
DESIGNATED HIGH-ALTITUDE LOCATIONS (COUNTIES)
ARIZONA Apache Cochise Coconino Navajo Yavapai
COLORADO Adams Alamosa Arapahoe Archuleta Boulder Chaffee Cheyenne Clear Creek Conejos Costilla Crowley Custer Delta Denver Dolores Douglas Eagle Elbert El Paso Fremont Garfield Gilpin Grand Gunnison Hinsdale Huerfano Jackson Jefferson
Kit Carson Lake La Plata Larimer Las Animas Lincoln Mesa Mineral Moffat Montezuma Montrose Morgan Otero Ouray Park Pitkin Pueblo Rio Bianco Rio Grande Routt Saguache San Juan San Miguel Summit Teller Washington Weld
IDAHO Bannock Bear Lake Bingham Blaine Bonneville Butte Camas
Caribou Cassia Clark Custer Franklin Fremont Jefferson Lemhi Madison Minidoka Oneida Power Teton Valley
MONTANA Beaverhead Deer Lodge Gallatin Jefferson Judith Basin Powell Madison Meagher Park Silver Bow Wheatland
NEBRASKA Banner Cheyenne Kimball Sioux
NEVADA Carson City
Douglas Elko Esmeralda Eureka Humboldt Lander Lincoln Lyon Mineral Nye Pershing Storey Washoe White Pine
NEW MEXICO Bernalillo Catron Colfax Curry De Baca Grant Guadalupe Harding Hidalgo Lincoln Los Alamos Luna McKinley Otero Mora Rio Arriba Roosevelt Sandoval San Juan San Miguel
Santa Fe Sierra Socorro Taos Torrance Union Valencia
OREGON Harney Klamath Lake
TEXAS Jeff Davis Hudspeth Parmer
UTAH Beaver Box Elder Cache Carbon Daggett Davis Duchesne Emery Garfield Grand Iron Juab Kane Millard Morgan Piute Rich
Salt Lake San Juan Sanpete Sevier summit Tooele Uintah Utah Wasatch Wayne Weber
WYOMING Albany Campbell Carbon Converse Fremont Goshen Hot Springs Johnson Laramie Lincoln Natrona Niobrara Park Platte Sublette Sweetwater Teton Uinta Washakie Weston