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Tuning and timing
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25-01-2010, 10:11 PM
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Old Grey
Junior Member
Join Date: Apr 2009
Location: Sydney
Car: Astina BG 1991 - Rx7 S4
Posts: 105
Pull the plugs and see if any are black or dark, you may need a hotter plug.
If the plugs are light colour don't go hotter or you may burn a hole in a piston.
Maybe try a different brand.
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