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What would cause unburned fuel in exhaust after plug wires distributor cap and rotor have been replaced?
Wiki User
∙ 16y ago
1) Bad catalytic converter.
2) Engine too cold (bad thermostat).
3) Retarded ignition timing.
4) Late ignition timing.
5) Fuel mixture problem.
6) Misfire with some other cause.
7) Internal engine problem.
8) Bad fuel.
Wiki User
∙ 16y ago
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