Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Suzuki SamuraiFACTORY OEM SERVICE PROCEDURE
Spark Test
- Using ohmmeter, ensure spark plug wire resistance of each wire is 3,000-6,700 ohms per 12" (10,000-22,000 ohms per meter).
- Remove coil wire from distributor cap. Use high output spark tester or hold coil wire terminal end 5/16" from an engine ground while cranking engine with clutch pedal fully depressed. Check for strong Blue spark from coil wire. Check for spark from each spark plug wire. If spark plug wires resistance tested okay but still no spark, go to step 4).
- To test spark plug wires, use high output spark tester or equivalent. If spark plug wires resistance tested okay but still no spark, go to next step. Hold coil or spark plug wire with insulated pliers or use high output spark tester to prevent electrical shock.
- Disconnect and inspect all related ignition system connectors and harness. Clean or repair as required and recheck spark. If spark plug wires still have no spark, go to appropriate next steps.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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