Help with codes P0133 and P1133
Help with codes About four months ago I installed race style LT's and true duals. I got the rear o2's deleted and the EGR and AIR systems are no longer conected. Since that time I have thrown codes on three seperate occasions for the front o2's. I thought my o2's were bad so I bought the corvette rear o2's and I am still throwing three codes. The codes are P0133(Drivers front o2 slow responce), P1133 (Drivers side running lean), and P1133 Pd which I think is the same as the second code. What could be wrong? Is it because the EGR is disconected from the headers but still bolted in to the intake? Could this create a vacuum leak? Any help would be appreciated. 
