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it runs great in low rpm range, but the wideband tells me I have fueling issue when the car makes boost the motor leans out, it bangs and hesitates etc, I'm looking for some places to check:
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Im planning on checking
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Replace fuel filter
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it's got a walbro, could this have gone bad?
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How about the fuel pressure regulator, could it be faulty, it's running a stock unit.
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Thoughts please.
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