T O P I C R E V I E W
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ALL STOCK LX
Member # 9635
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posted
Just put some trick flow heads on my 91 fox and now my spark plugs are black and preventing spark. Does anyone know what that means and what's the best spark plugs to go with
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89bluenotch
Member # 7454
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posted
I usually just use the cheap autolites 3924's i believe
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ALL STOCK LX
Member # 9635
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posted
That's the plugs I'm running but don't know why they are black
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Adam5.0
Member # 6995
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posted
running rich. check for vacuum leaks
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carlos604
Member # 6180
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posted
what are they gapped at? they need to be at 35-40 but double check their website or call their tech line....
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ddarkslayer
Member # 10688
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posted
whats your compression ratio now since you swapped the heads. 54 is the gap rating used for the stock E7 heads
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