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Old 06-13-2010, 02:41   #1 (permalink)
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Cold Misfire

96 Taurus GL 3.0L / Just had cyl. Heads Reman. On cold start only / throws a cyl. 6 misfire code. When erased when warm, no code given. Replaced wires to no avail. Car seems to run fine / but throws codes. Gets an occasional 52 for airbags / when reset is fine for weeks, then mysteriously reappears. Only other codes are the 420 and 430 for the cats (Ca. Vehicle) and these are very infrequent. Car is smogged, but I'm sure it could benefit from the new cats, but the cost factor for Cali emission is high.
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Old 06-13-2010, 07:55   #2 (permalink)
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Re: Cold Misfire

It's very possible that you have a bad coil. If the engine isn't warming up to normal, or if there's an exhaust leak it can cause the P0420 and P0430.
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Old 06-14-2010, 15:55   #3 (permalink)
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Re: Cold Misfire

I have noticed that if I allow a quick warm-up before driving, it doesn't throw the misfire code.
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