So I decided that I was going to change all 6 fuel injectors, wires, and spark plugs on my 1990 SC. The car runs excellent in park and neutral at idle but when I put in reverse or drive it starts to vibrate and make rattling noises really bad. You dont hear/feel anything if your driving down the road but if you hit a stoplight you immediately feel the vibration and hear the noises....anyone else have this kind of problem before?