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I went and hooked it up to a machine, there was no code. All it said was to service fuel system. I changed fuel filter under truck, primed 2x then changed fuel filter under hood and primed 2x. Is there something I’m missing? Why would that send it into reduced power mode?
Well for one change lower file filter first then change upper filter, no prime in between. Secondly, I would go out and prime it about 3 or 4 times. I always do mine 4 times then go drive after the last one. I have never in 4 years had your issue.
 
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