Check everything else an engine needs to start. Fuel would be the first thing I'd check. Then also check ur timing, ur timing belt could have jumped a tooth or two, causeing the engine to not start, If all else fails, u could do a compression test. Check to make sure the fuel pump is priming when u turn ur car to the on position but not started yet, their should be a hissing sound coming from under the hood pretty noticeable. Any cel's?... Hope this helps