Hello all, I have a 2009 corolla that needed a new camshaft gear because it was making noise, I order the part, installed the gear. When I put everything back together, the car is misfiring on cylinder 4 code P304 and P354, which it did not do before i install the part. Is there anything I may have done or not done. I believed I put everything back together correct. even the timing was good. I am going to take it apart again. Appreciate all input.