Help

i drove my duster sat. and noticed a fuel leak so i drove it back home and found that it was the line to the fuel pump. replace it but now when i started it it sounded like a gun shot and does not start. i replace the distr. and plugs and rotor. it sounds like a popping noise. i wonder if the timing chain skipped? what do you guys think? it was running great before i changed the line...Rick