hi. my 79 240 stalled out on me on the highway yesterday, acting like it was running out of gas. however, the tank was full. it had been getting progressively worse all day. i suspected a clogged fuel filter. that was the first thing i replaced. then i swapped out the coil, wires, and thrrew in a set of semi-used plugs. the old plugs were a bit fouled, like oily (or gassy, not quite sure. they were dirty). dont have a coil wire to swap. cracked the line at the filter, def getting pressure. any suggestions? sometimes it wants to start, and itll give a little cough, but not take. please help!