88 Ford 2.3L Efi timng problems?

I just purchased a 88 mustang, when i crank it over it does do anything but crank. I tested the injectors and they are getting a signal and the plugs are firing. I have moved the timing belt 3 times to try to get it dead on , i get the crank at tdc and the distributer to number one cylnder but i wasnt so sure about the cam because someone looked it up in a book and it said to position the dot on the wheel all the way to the top but i found on the internet it said to line it up with a mark at the bottom , I've ran it both ways and it backfires out of the intake no matter what i do