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Trying to diagnose my misfire


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Hi all :)

So I've been getting a bit of a misfire/sputter/hesisation at WOT in my 1997 Skyline GTST. BK7RE plugs at 0.8mm gap, 8 PSI boost, stock coilpacks. I recently gapped them down to 0.7mm which improved the WOT performance quite a lot, but now that I've installed a front mount and upped my boost to 10 PSI and my hesitation issue is back stronger than ever. Do these syptoms suggest that my coilpacks are at fault? I run 98 fuel and have a near new fuel filter, too. 

Edited by Custard
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