Asked in Mazda Millenia
Mazda Millenia

What would cause a rough idle on a 'warm start' on a 2002 Millenia with Miller Cycle engine with 68K?

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Answer

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11/16/2009

bad coil(cop hates heat, coils short out when hot)

bad gas-vapor lock

bad fuel pressure regulator

bad drainback valve, no fuel in the rail