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rnln	06-02-2013 04:43 AM

for passing smog test purpose, hotter or cooler spark?

I have a question on purpose of passing smog test. Should I use hotter or cooler spark? BPR6ES, BPR7ES, BP6ES, BP7ES which is better?
Thanks.

manbridge 74

06-02-2013 05:55 AM

I would say hotter though a working O2 sensor should be all you need on a well tuned car.

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