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Home >> Chevrolet >> 1987 >> Chevette 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Testing >> Intermittent Problems

Intermittent Problems

  1. Attach modified spark plug, in turn, to 2 different spark plug wires and crank engine. If no spark, repeat previous test, System Voltage Check with Modified Spark Plug.
  2. If spark occurs from one or both wires, check pick-up coil resistance for 500-1500 ohms. If not to specifications, replace pick-up coil. If okay, check for dwell increase from a high to low RPM.
  3. If dwell increases, check fuel system, spark plug wires, distributor cap and spark plugs. If no increase occurs, replace electronic module.
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