So I bought a 1997 f150 last night ( I know it’s not a mustang but it’s a sn95 at heart ). But the guy said he thinks it jumped timing right after installing a new motor. It does seem to crank like its off timing ( farts thru exhaust and pops thru exhaust). I got it cranked for a split second last night but that’s it. All the sensors are plugged up spark plug wires are in the correct order. Any ideas on what to try before I condemn this motor