Old Spark plugs - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-15-2007, 12:52 AM   #1
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Default Old Spark plugs

These pictures mean anything to anyone? My car has had some issues with miss fire under boost. After installing a WBO2 and tuning the map in boost (was using stock FM2 map before) I have had less problems with the miss fire. It still seems to come up from time to time though. I think I was running insanely rich before. Right now I am still using the stock FM O2 targets which are probably still way to rich.

These are just some regular NGK Vpower, stock heat range, BKR6E, gapped at .03. I have wondered about moving to a colder plug, but am worried about them fouling. I spend a lot of time commuting and stuck in traffic.
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Old 05-15-2007, 01:52 AM   #2
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I believe the best way to use your plugs as a gauge of what is going on is to put new ones in, do a 10 minute run and cut the car off and coast to a stop. This will show you what they looked like while driving, not what they look like after sitting at idle in the driveway.
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