96 3.8 idling low and stalling
 

Had my engine washed 3 days ago by someone who claims to do this all the time, ever since then my car was idling rough, engine light on, battery light on and wanting to stall. I did everything I could think of and also everything that was coming up when I took it to AutoZone to have the codes checked and its still driving kind of rough and when its sitting still it idles low and wants to stall, here is a list of everything I have done so far
changed coil pack
changed plugs and wires
changed throttle position sensor
replaced vacuum lines
replaced battery (due to the fact that Autozone said it needed to be but it was still under warranty)
replaced battery terminals
I should mention the fuel pump is not even a year old yet and I checked all the fuses under the hood too
Does anyone have any suggestions? I have taken it to a couple mechanics and they are stumped too...the engine light and battery light have went off