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83 280 na, power fluctuations

238 Views 1 Reply 2 Participants Last post by  steves280
My z has had a problem since I bought it a year ago. The power will fluctuate about 15-20 hp. Does anyone know what could be causing this?

I notice it most going up steep hills. I don't think the hill has anything to do with it, that's when I'm on the gas the hardest.
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You mean it's "surges? Could be lots of things: fuel pressure problems, an AFM that adjusted too lean etc.
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