Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1966CHEVELLE BASE, 2D CONVERTIBLE, 4.6L ENG, AUTOMATIC TRANS, TRANS MFR CD POWERGLIDEREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONENGINE PERFORMANCESTATE EMISSION STANDARDS - GASU.S. EPA IM240 EMISSION STANDARDSSTART-UP STANDARDS
1966 Chevrolet Chevelle Base, 2D Convertible, 4.6L Eng, Automatic Trans, Trans Mfr CD Powerglide
Start-Up Standards
1966 Chevrolet Chevelle Base, 2D Convertible, 4.6L Eng, Automatic Trans, Trans Mfr CD PowerglideSECTION Start-Up Standards
Start-up standards should be used during the first 2 years of program operation. Tier 1 standards are recommended for all 1996 and newer vehicles and may be used for 1994 and newer vehicles certified to Tier 1 standards as well.
U.S. EPA IM240 HYDROCARBONS EMISSION START-UP STANDARDS
| Application | Hydrocarbons (Grams/Mile) | ||
|---|---|---|---|
| Composite | Phase 2 | ||
| Light Duty Vehicles | |||
| 1996 & Newer | 0.80 | 0.50 | |
| 1991-95 | 1.20 | 0.75 | |
| 1983-90 | 2.00 | 1.25 | |
| 1980-82 | 2.00 | 1.25 | |
| 1975-79 | 7.50 | 5.00 | |
| 1968-74 | 10.0 | 6.00 | |
| High Altitude Light Duty Vehicles | |||
| 1983-84 | 2.00 | 1.25 | |
| 1982 | 2.00 | 1.25 | |
| Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 3750 LVW) | 0.80 | 0.50 | |
| 1996 & Newer (More Than 3750 LVW) | 1.00 | 0.63 | |
| 1991-95 | 2.40 | 1.50 | |
| 1984-90 | 3.20 | 2.00 | |
| 1979-83 | 7.50 | 5.00 | |
| 1975-78 | 8.00 | 5.00 | |
| 1968-74 | 10.0 | 6.00 | |
| High Altitude Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1991 & Newer | 3.00 | 2.00 | |
| 1984-90 | 4.00 | 2.50 | |
| 1982-83 | 8.00 | 5.00 | |
| Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 5750 ALVW) | 1.00 | 0.63 | |
| 1996 & Newer (More Than 5750 ALVW) | 2.40 | 1.50 | |
| 1991-95 | 2.40 | 1.50 | |
| 1984-90 | 3.20 | 2.00 | |
| 1979-83 | 7.50 | 5.00 | |
| 1975-78 | 8.00 | 5.00 | |
| 1968-74 | 10.0 | 6.00 | |
| High Altitude Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1991 & Newer | 3.00 | 2.00 | |
| 1984-90 | 4.00 | 2.50 | |
| 1982-83 | 8.00 | 5.00 | |
| Heavy Duty Trucks (Greater Than 8500 Lbs. GVWR) | |||
| 1998 & Newer | 2.00 | 1.30 | |
| 1987-97 | 3.00 | 1.90 | |
| 1985-86 | 5.00 | 3.10 | |
| 1979-84 | 6.00 | 3.80 | |
| 1970-78 | 10.0 | 6.30 | |
| 1969 & Earlier | 20.0 | 12.50 | |
U.S. EPA IM240 CARBON MONOXIDE EMISSION START-UP STANDARDS
| Application | Carbon Monoxide (Grams/Mile) | ||
|---|---|---|---|
| Composite | Phase 2 | ||
| Light Duty Vehicles | |||
| 1996 & Newer | 15.0 | 12.0 | |
| 1991-95 | 20.0 | 16.0 | |
| 1983-90 | 30.0 | 24.0 | |
| 1980-82 | 60.0 | 48.0 | |
| 1975-79 | 90.0 | 72.0 | |
| 1968-74 | 150.0 | 120.0 | |
| High Altitude Light Duty Vehicles | |||
| 1983-84 | 60.0 | 48.0 | |
| 1982 | 75.0 | 60.0 | |
| Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 3750 LVW) | 15.0 | 12.0 | |
| 1996 & Newer (More Than 3750 LVW) | 20.0 | 16.0 | |
| 1991-95 | 60.0 | 48.0 | |
| 1984-90 | 80.0 | 64.0 | |
| 1979-83 | 100.0 | 80.0 | |
| 1975-78 | 120.0 | 96.0 | |
| 1968-74 | 150.0 | 120.0 | |
| High Altitude Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1991 & Newer | 70.0 | 56.0 | |
| 1984-90 | 90.0 | 72.0 | |
| 1982-83 | 130.0 | 104.0 | |
| Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 5750 ALVW) | 20.0 | 16.0 | |
| 1996 & Newer (More Than 5750 ALVW) | 60.0 | 48.0 | |
| 1991-95 | 60.0 | 48.0 | |
| 1984-90 | 80.0 | 64.0 | |
| 1979-83 | 100.0 | 80.0 | |
| 1975-78 | 120.0 | 96.0 | |
| 1968-74 | 150.0 | 120.0 | |
| High Altitude Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1991 & Newer | 70.0 | 56.0 | |
| 1984-90 | 90.0 | 72.0 | |
| 1982-83 | 130.0 | 104.0 | |
| Heavy Duty Trucks (Greater Than 8500 Lbs. GVWR) | |||
| 1998 & Newer | 30.0 | 24.0 | |
| 1987-97 | 60.0 | 48.0 | |
| 1985-86 | 75.0 | 60.0 | |
| 1979-84 | 100.0 | 80.0 | |
| 1974-78 | 150.00 | 120.0 | |
| 1970-73 | 175.00 | 140.00 | |
| 1969 & Earlier | 200.0 | 160.0 | |
U.S. EPA IM240 OXIDES OF NITROGEN EMISSION START-UP STANDARDS
| Application | Oxides Of Nitrogen (Grams/Mile) | ||
|---|---|---|---|
| Composite | Phase 2 | ||
| Light Duty Vehicles | |||
| 1996 & Newer | 2.0 | 2.0 | |
| 1991-95 | 2.5 | 2.5 | |
| 1981-90 | 3.0 | 3.0 | |
| 1977-80 | 6.0 | 6.0 | |
| 1973-76 | 9.0 | 9.0 | |
| 1968-72 | 10.0 | 10.0 | |
| High Altitude Light Duty Vehicles | |||
| 1982-84 | 3.0 | 3.0 | |
| Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 3750 LVW) | 2.0 | 2.0 | |
| 1996 & Newer (More Than 3750 LVW) | 2.5 | 2.5 | |
| 1991-95 | 3.0 | 3.0 | |
| 1988-90 | 3.5 | 3.5 | |
| 1979-87 | 7.0 | 7.0 | |
| 1973-78 | 9.0 | 9.0 | |
| 1968-72 | 10.0 | 10.0 | |
| High Altitude Light Duty Trucks (0-6000 Lbs. GVWR) | |||
| 1991 & Newer | 3.0 | 3.0 | |
| 1988-90 | 3.5 | 3.5 | |
| 1982-87 | 7.0 | 7.0 | |
| Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1996 & Newer (Less Than 5750 ALVW) | 2.5 | 2.5 | |
| 1996 & Newer (More Than 5750 ALVW) | 4.0 | 4.0 | |
| 1991-95 | 4.5 | 4.5 | |
| 1988-90 | 5.0 | 5.0 | |
| 1979-87 | 7.0 | 7.0 | |
| 1973-78 | 9.0 | 9.0 | |
| 1968-72 | 10.0 | 10.0 | |
| High Altitude Light Duty Trucks (6001-8500 Lbs. GVWR) | |||
| 1991 & Newer | 4.5 | 4.5 | |
| 1988-90 | 5.0 | 5.0 | |
| 1982-87 | 7.0 | 7.0 | |
| Heavy Duty Trucks (Greater Than 8500 Lbs. GVWR) | |||
| 1998 & Newer | 4.0 | 4.0 | |
| 1991-97 | 6.0 | 6.0 | |
| 1979-90 | 8.0 | 8.0 | |
| 1970-78 | 10.0 | 10.0 | |
| 1969 & Earlier | 15.0 | 15.0 | |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.