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Home >> GMC >> 1995 >> Forward Control 4.3 Z, Standard >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul - 4.3L >> Ignition System >> Distributor (HVI - High Value Ignition System) >> Removal

Distributor (HVI - High Value Ignition System): Removal

  1. Ensure ignition is off. Disconnect spark plugs and coil leads from HVS cap. Disconnect 3-wire camshaft position sensor plug from base of HVS. Remove 2 screws holding cap to HVS housing.
  2. Mark HVS cap with a grease pencil to indicate position of rotor to housing. Loosen mounting clamp hold-down bolt and slide clamp back.
  3. Remove HVS. See Figure. When HVS is being removed rotor will rotate approximately 42 degrees. Place a second mark at this position for reassembly reference. If the original HVS is being replaced, transfer marks made during removal to replacement component.
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