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 MANUALSCHEVROLET1982CAVALIER BASE, 4D SEDAN, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSCOMPUTER COMMAND CONTROLDIAGNOSTIC PROCEDURECONNECTING DWELL METER
1982 Chevrolet Cavalier Base, 4D Sedan, Automatic Trans
Connecting Dwell Meter
1982 Chevrolet Cavalier Base, 4D Sedan, Automatic TransSECTION Connecting Dwell Meter
- A dwell meter set on "6-cylinder" scale for all carbureted engines is used to measure ECM output and M/C dwell (duty cycle). A green connector located in wiring harness near carburetor is the dwell meter connection point.
- When dwell meter is connected, do not allow terminal to touch any ground source, including hoses. This could damage ECM. On a normal operating engine, dwell at both idle and part throttle should read between 10-50° and will be varying. "Varying" means needle will continually move up and down the scale. The amount of variation does not matter, only fact that it does move.
- This variation of needle indicates system is in closed loop and ECM is responding to signals from oxygen sensor. At wide open throttle or cold engine operation, dwell will be fixed (needle steady). This indicates open loop and that ECM is ignoring oxygen sensor signals.
- If there is doubt whether engine is in closed loop or open loop, richen or lean mixture (choke carburetor or cause air leak). This action will cause dwell to change if engine is in closed loop.
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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.