I have a 99 4.0 that started sometimes and when I would use carb cleaner in the intake it would start always. I changed the fuel pump and now no fire at coil. I changed the coil, CPS, cap,rotor,plugs and still no fire. I have continuity at the front of the coil and the front of the CPS. Tried moving all the relays around in the power dist center but nothing. I lost please help??