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Home >> GMC >> 1997 >> Forward Control 5.7 R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Engine Controls - Basic Testing - 5.7L) >> C-4, Basic Ignition System Checks >> HEI-Est Distributor >> Distributor Pick-Up Coil Short & Resistance Checks

Distributor Pick-Up Coil Short & Resistance Checks

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  1. Disconnect pick-up coil leads from module. Using ohmmeter, check pick-up coil resistance. Connect ohmmeter to distributor housing and either pick-up coil lead (step 1 in illustration). See Fig 1. Flex pick-up coil leads by hand to check fo r intermittent short to ground. If reading is not always infinite, replace pick-up coil.
  2. Connect ohmmeter between pick-up coil leads (step 2 in illustration). See Fig 1. Check for intermittent open by flexing wire s and connectors. If resistance is not 500-1500 ohms, replace pick-up coil.
Fig 1: Checking HEI-EST Distributor Pick-Up Coil
G93I76560Courtesy of GENERAL MOTORS CORP.
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