I have a 1990 mustang that up to about a week ago ran perfect. My battery took a crap so I put another one in it. Now here's the problem, as soon as I put the battery in and hop in the car I turn the key on and notice that the fuel pump relay under the seat keeps clicking and now the car won't start. So trying to diagnose the problem my self I start replacing parts. Parts replaced- relay under the seat, distributor cap and rotor, coil, tfi module, fuel filter. Still problem not solved. I haven't replaced the fuel pump because I'm sure it still works because I can hear it and has pressure at the fuel rail. Something else I noticed was that I have spark at the coil to the distributor cap but no spark at the plugs. Please help!!