cranking engine but no spark. why? on 1993 Ford Ranger

I have a 1993 ford ranger, 2WD, shortbed, stick shift. the engine is a 4 cylinder. I have a problem with it. it wont start but it cranks. the battery is fully charged when starting it we checked for spark. no spark on any of the 8 spark plugs and the spark plugs are brand new with nothing wrong.we tried to look for a bad connection but couldnt find one. Any ideas what could be the issue?

Asked by for the 1993 Ford Ranger
Have you tried putting the timing pass 10 degrees from top dead center I had the same issue until I put the right timing. I have the same year make and model