mjltigger
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- Trowbridge, Wiltshire...
Had a Focus Rs with one on the other day at work.. The plug was sparking but it would not catch light
good....
surely the only thing in exhaust that would light with a spark is unburnt fuel and unburnt fuel means a reduced burn which means less power from the engine.. a good clean burn with not enough unburnt fuel in the exhaust to ignite means your getting the most power you can out of your fuel