Rep Power: 0

I have a 2008 Honda civic 1.8 L 5 speed manual.
one day it started sputtering on the highway, I stopped at gas station and it started back up and didnt do it again. I got to my destination and went to go for dinner and it would start. Thought fuel pump, changed that, still wouldn’t start. Was suggested to take cat off and it started. Thought plugged cat was the problem. Replaced the cat. Now will not start again. Someone please direct me what to try now. Thanks

 
Rep Power: 222

You need to do actual diagnosing