Im having the same problems and codes.
Im thinking its just tunning since i droped the cam in.

 

Pull the ENG SEN fuse and see if its blown. If it is replace and reset the PCM. If it continues to run like **** and the fuse keeps blowing, you might have a O2 sensor wire melting. If it stops blowing(ENG SEN) then check the grounds on the back of the heads as well. Make sure they are tight..

 

Ok checked the ecm sen fuse it is good, but i also checked the 02 sensor on the rear of the driver side longtube it had got up against the header but it dont look like it had gon all the way thru...

Oh yea im pretty sure the tuner deleted the o2 sensors...

 

Did you put the cam back to 0*

 

the timing? yeah i did

 

Did you check the grounds off the back of the heads?

How much damage is done to the O2 sensor wire? Doesnt have to be melted all the way through to cause it to go wacky.

 

I will check the grounds, but would that make a difference if the 02 sensors are deleted?

 

Is the car speed density? My car is, but I still have my front o2 sensors working