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Hey all,

My r33 is running rough as. Because of a miss after about 4500rpm while hard on the throttle Yesterday i re-gapped my spark plugs to 0.7, coated my coil packs with a clear non-metalic varnish (nail polish).

My car doesnt miss now but it doesnt pull up at 5000rpm it feels like its struggling and slowing.

Am i better off buying new spark plugs as these ones are over a year and a few months old?

My coil packs seemed fine, good condition, no cracks. I am going to replce the fuel filter.

Not sure what else to do? :(

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https://www.sau.com.au/forums/topic/159032-running-rough/
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