Ok so my car has been throwing a LOT of codes...among which are both lean and rich....anyways...ive been trying to track down the problem for awhile...it turns out that the guy who did the wiring on my car used the purge solenoid power wire as his power source for my ewp and my o2 sensors. The shop "different shop" changed the feed and suddenly the car doesnt throw any codes and they say it even sounds better........WARNING DO NOT USE PURGE SOLENOID WIRE FOR EWP.