1994 plymouth voyager 3.0 won't start

could be, or the cam. (my 93 broke the cam). but check and make sure you have spark and fuel. You might want to get a mechanic to look at it, in case it is a sensor

Could be timing belt, but that's somewhat uncommon with the 3.0L engine, these were decent Mitsubishi engines. Although, you might have a timing belt failure if not properly maintained. How is the fuel? Are you getting fuel to the injectors?

I'm getting fuel to the injectors but no spark timing belt has been replaced timing belts do good something electrical