I have a 2001 Prelude SH and as the topic mentions I need help. My problem is, when I have my car in gear and I step on the accelerator my car starts to shake from 30mph-around 75mph. When I shift the car in nuetral the bribration and shaking is gone. The vibration is coming from the whole front end of the car and I feel it in the steering wheel. I intitally ran into this problem about 2 months ago and had all 4 tires changed, balanced and aligned. The problem went away until recently. I took the car back to the shop where I had the tired replaced and they said the tires where fine and even looked at my front end suspension and said nothing was wrong. I thought it either might be my axle, transmission, or motor mounts. I had them checked out and they're fine. I even considered the possibility that it's my motor, but the place where I had my tranny looked at said my motor is running strong. Right now, I'm frustrated and thinking that it either might be my sparkplugs or the settign of my VAFC unit. Any help or advice at this time would be of great help.