My girl was drivin the LSE for the last days befor the rebuild and called me. She said the check engine light had blinked bunch of times and the A/C went off/just hot air and was very slugg. She got it home and i had a solid c/e light and EC of cylinder 4 mis fire so i changed all 8 coils and V/C gaskets . the CEL went out but sill have a miss . help if you can