I just had my timing belt replaced and now my CEL is coming on with errors for my O2 sensor and Timing Over advance. My car runs like crap. No power, Idles rough, dies when I come to a stop, idle surges up and down a few hundred RPM's and exhaust pops like it's missing on a cylinder. The #18 fuse that controls the O2 sensors keeps popping also. Will just the O2 sensor issue cause the car to run bad and cause the timing over advance fault also? Please, one of you high speed gear heads give me some hope.... Thanks.