2004 corolla, did a C60 swap on. did not touch the engine at all and somehow all 4 cylinders are misfiring with a lean bank 1. I checked plugs and coils. coils were oily so i replaced the gasket assuming that would solve my issue. it did not. All vacuum lines were smoke checked and cleared. all grounds were cleaned or replaced, even added an extra. MAF cleaned properly. injectors are getting proper pressure and intake manifold gasket is fine. no clue what to do next. if anyone has any suggestions please let me know.