Fire to spark plugs

1990 CHEVROLET CAPRICE
V8 • AUTOMATIC
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BYRONCHEVYMAN
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My 1990 caprice will start but 4 of my spark plugs are not gettting fire, whats wrong?
Feb 5, 2011 at 2:08 AM
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JDL
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How long since tune-up. plugs--plug wires--cap and rotor. Any applicable mil codes? Did you visually check for spark at the plugs?
Feb 5, 2011 at 4:28 PM
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BYRONCHEVYMAN
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I just gave it a tune up a few days ago..And yes I visually checked by pulling them out 1 by 1 and 4 of them didnt change the motor and wasn't gettin a spark
Feb 7, 2011 at 8:47 PM
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JDL
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Use a test lite on negative side of coil, engine cranking, there should be a pulse? If no pulse, suspect the ignition module or pick-up coil. There should be primary voltage at the coil with key on.
Feb 7, 2011 at 9:15 PM