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Re: More P0171/174 fun: '03 Expedition 4.6L
Posted to Technical Theory Forum on 5/24/2007 12 Replies

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Really? That load PID a 92% and the speed sure rules out vacuum leaks & the MAF for me. At this point I am checking pressure first which is what Allen did and it dropped on snap throttle. That gives d... Login to read more.

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