MRPN

need some advice on what i should do to get it running again i pumped the water out and it stil dont want to run throwing code p0171 systen to lean but the rear two plugs are staying wet there are 24 different causes for this code i have the actual mazda shop manual i bought from mazda. can any one can help me please i got gas and car went 1.5 miles the died pumped tank and got water and rusty trash from the plastic tank