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 MANUALSCHEVROLET1971CHEVELLE BASE, 2D CONVERTIBLE, 5.0L ENG, ENG CD CCC, AUTOMATIC TRANS, TRANS MFR CD POWERGLIDEREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONENGINE PERFORMANCESTATE EMISSION STANDARDS - GASPENNSYLVANIA
1971 Chevrolet Chevelle Base, 2D Convertible, 5.0L Eng, Eng CD CCC, Automatic Trans, Trans Mfr CD Powerglide
State Emission Standards - Gas: PENNSYLVANIA
1971 Chevrolet Chevelle Base, 2D Convertible, 5.0L Eng, Eng CD CCC, Automatic Trans, Trans Mfr CD PowerglideSECTION PENNSYLVANIA
NOTE:
The Pennsylvania (in Philadelphia area) program incorporates original U.S. EPA recommended start-up ASM5015 standards for 1981 and newer model year vehicles. Refer to appropriate model year range in appropriate table. See U. S. EPA ASM2525 & ASM5015 START-UP EMISSION STANDARDS .
PENNSYLVANIA EMISSION STANDARDS - PITTSBURGH & OLDER PHILADELPHIA VEHICLES - IDLE TEST
| Application | HC ppm (CO %) | |
|---|---|---|
| 6000 GVWR Or Less | ||
| 1975-79 | 400 (4.0) | |
| 1980 | 300 (3.0) | |
| 1981-92 | 220 (1.2) | |
| 1993 & Newer | 130 (1.0) | |
| 6001-9000 GVWR | ||
| 1975-78 | 650 (6.0) | |
| 1979 | 400 (4.0) | |
| 1980 | 300 (3.0) | |
| 1981-92 | 220 (1.2) | |
| 1993 & Newer | 180 (1.0) | |
RENDER: 1.0x
NO RELATED
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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.