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Re: More P0171/174 fun: '03 Expedition 4.6L
Posted to Technical Theory Forum on 5/21/2007 3 Replies

OK, I'll risk some skinned knees and come off the bench. Following some of the other threads I will assume the answer you are looking for is MAF not under reporting. The trims indicate this is starving for fuel. Is this falling flat on it's face under these ci... Login to read more.

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