Bad spark plug symptoms may include rough idle, hard starting, weak acceleration, misfires, fuel changes, and a check engine light. However, these signs do not identify one failed part without inspection. Several ignition, fuel, electrical, and mechanical faults may produce similar warning signs. Spark plugs ignite the compressed air and fuel mixture inside each gasoline […]

Tags: bad spark plug symptoms, hard starting, Mazda check engine light, Mazda ignition coil, Mazda Service, Mazda spark plugs, rough idle, spark plug misfire
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