Car wont start

After I got gas in my car I hit the highway and almost immediately it lost power and was sputtering barely staying running. After towing it home I emptied the gas and put a couple gallons of fresh fuel and cleaned the fuel injectors, replaced the coil pack and igniter, and I get fuel out the tailpipe but no fire. I was about to go get a new computer module but then figured id research first to get ideas. Could it be burnt valves. I know its not timing belt since I had just replaced it. I left the timing belt cover off since it is broken anyways so it is still visible and everything looks intact and correct. Im almost out of options and would hate to get rid of the car since it is a good vehicle. Would I be better off replacing engine or whole car?