Also what color is ur evp?
Lt gray at closed should read 0.5 volts and the black 1 should read 0.9 closed.

 

my EVP is the gray one

UPDATE: my buddy had a 5.0 Bronco hes parting out and he let me have the EGR valve with the EVP, and the EVR since they were free i just threw them on for S/G and it seems the 334 is gone. im having a bunch of other codes but ill tackle them in another thread but i think i have the 334 solved thanks guys