I have a 88 xj with a 4.0 it cranks but not start it has power going to the coil and out of coil to dist but no spark coming out of wires I just put a 2nd new set of cap rotor and wires because I thought that was the problem but I still can't get it to spark I just ordered a starter plans are to put it in tomorrow ..... The coil is new and the crank is new reading 0.47 volts ac help please