Randomly won't start.
 

about a week ago my car (88 4 cyl) woulden't start, it gets spark and gas. It's getting the compression, it's turning over, but just won't start. I replaced the spark plugs, spark plug cords, coil, distributor cap, control module..I can't think of what else it could be besides the timing. Thats my next step but does anyone else have any advice?
Thanks.