I just replaced my spark plug wires with some FRPP 9mm and replaced the cap and rotor as well. I started the car and its got this akward shake and just a couple of moments after running I begin to hear what sounds like knocking coming from the cylinders. I checked to make sure all the boots were in properly and made sure the coil wire was also making good contact. I made sure everything was on right several times and still nothing. I also made sure each plug had its corresponding wire and correct position on the distributor. Do I have to readjust the timing?