Spark Test

1995 Geo Tracker Base, 1.6 6, 4WD, StandardSECTION Spark Test
  1. Disable fuel injector(s) by disconnecting injector connector. Remove coil wire from distributor cap. Have a helper depress clutch pedal (if required). Using a high output spark tester or holding coil wire terminal end 5/16" from an engine ground with an insulated holder, crank engine. Check for strong Blue spark from coil wire. If spark does not exist, continue with ignition checks.
  2. If spark exists at coil wire, check for spark from each spark plug wire. Remove spark plugs and connect them to spark plug wires. Ground spark plugs. If spark exists on one or more spark plug, check plug wire resistance. Using ohmmeter, ensure resistance of each plug wire is 3000-6700 ohms per foot. Replace any plug wire that does not test as specified.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.