I have searched so many times on this site and it has helped tremendously! Now I have no choice but to post....This truck is mine and my girlfriends main form of transportation

My 2000 ford ranger 4.0 v6 with 112,000 miles was running rough, so I changed my spark plugs and oil. It ran great for 2 days. the 3rd day i tried to start it and it cranked, then stumbled. it refused to start. I cleaned the IAT sensor, MAF, and throttle body. It ran again but very rough. the next day it didn't want to start again so I sprayed ether along the edge of the intake plenum gasket and noticed it was sucking it in. I then changed the intake plenum gaskets last night. After putting it all back together i t cranked a few times like before but then after about 15 trys it started up and evened out the idle. Today I drove the car and ran rough but decent (I attributed the rough idle to sensors relearning). Once I parked the car; it refused to start up again! I have racked my brain and cannot figure out whats wrong. FYI the only codes being thrown are O2 sensor lean codes.

P1131 O2 sensor Bank 1 too lean
P1151 O2 sensor Bank 2 too lean
P0171 System too lean (bank 1)
P0174 System too lean (Bank 2)

 

I had a similar problem, the pcv tube going along the side of the engine has a 90 degree elbow that split down the side. I had a sucking sound that I followed to the hose.

 

Any possibility you got water that went through your engine into your cats?. Does it even turn over