My motor was running a little rough and missing some RPMs, so after a little troubleshooting I replaced the ignition coil. When I took the ignition wire off of the cap I noticed it was very green. The new wire does not seem to stay on very well. The motor runs awesome for a little while then I can here some sparking in the cap. It then starts to miss a little. If I reseat the coil wire, it is fine. I think I need to replace the cap. I notice that it is 2 pieces. What is the bottom half called (don't want to buy the wrong thing)? Is there a one piece cap? Also, are the plug wires the same as a Chrysler car motor?<br /><br />Thanks!!