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Re: p0174/p0171 ...other possible causes?
First time I got those codes on my windstar it was the fuel pressure regulator vacuum line which had loosened up and came off the intake. Replaced that and didn't have to do the isolator bolt fix until 2 years later.
Watch ebay for a redesigned plenum and baffle, I got one for $40 including shipping.
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1997 Pathfinder XE
Air Lift Air Bags, Warn Hubs
2000 Windstar SEL
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