Started yesterday, today I changed plugs and wires but it was still in limp home. I limped it to a chain auto parts store and they pulled 3 codes- P1155, P1193, and P0302. I was running under the assumption that the misfire code was what caused the limp home so I disconnected the battery for an hour. Started it all seemed good but went back into limp home, and no CEL now. Any ideas?