5.9 Magnum help needed

As I stated above the timing chain braking would not let it fire at all unless it was completely wore out and jumped a notch or two.If you could check with a timing light that would eliminate timing.It is VERY odd that you didn't get any flashes from the codes.You have to do it within 5 seconds for it to register that you want the codes.Check all the fises in the dash and under the hood.