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Home >> Pontiac >> 1992 >> Firebird Formula, 5.0 F, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Basic Testing) >> Basic Ignition System Checks (C4) >> HEI-Est Distributor >> Distributor Pick-Up Coil Short & Resistance Checks

Distributor Pick-Up Coil Short & Resistance Checks

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, and 1991 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect pick-up coil leads from HEI/EST module terminals "N" and "P". Set ohmmeter to middle scale. Connect one ohmmeter lead to either pick-up coil lead and the other lead to distributor housing. Flex pick-up coil leads by hand to check for intermittent shorts to ground. Reading should be infinity at all times. If resistance is not infinite, replace pick-up coil.
  2. Connect ohmmeter between both pick-up coil leads. Check for intermittent opens by flexing wires and connectors. Resistance should be 500-1500 ohms. If resistance is not as specified, replace pick-up coil.
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