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Home >> Jeep >> 1994 >> Wrangler Sahara, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls - Basic Testing) >> Ignition Checks >> Secondary Spark >> Spark Test

Spark Test

WARNING: This page is about a different car, the 1994 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove coil wire from distributor cap. Hold end of cable about 1/4" from ground. Crank engine. Spark should be present and constant. If spark is not present and constant, check coil and coil wire resistance. Perform IGNITION PRIMARY  test under IGNITION CHECKS.
  2. If coil wire spark is present, ensure spark reaches spark plugs. Check condition of rotor, cap, spark plug wires and spark plugs. Repair or replace if necessary. Spark Plug & Coil Wire Resistance Resistance should be 250-1000 ohms per inch.