My sons 96 3.0 started running a little rough and a little surging the other day. The codes that came up were P1131, P0171, P0174. Any help will be greatly appreciated.
oh thats a easy one, their are other things that could give a reading like that.
try looking at your pcv valve, these things will result in those readings, the hoses usually crack around them, it causes a vacuum leak and those are the readings you will get.
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