Originally Posted by riverrrat321

My EF Falcon 6cyl sends a lot of vibration through the car while ideling in gear (auto). If i put it in neutral the vibration pretty much stops. When its cold and ideling faster the problem isn't as bad. Also if i give it some throttle while in gear to bring the revs up it stops vibrating. Any idea what the problem could be??? The only thing i can think of is it's ideling to slow. How fast should it idle in park and in gear? How do i increase the idel speed if this is the problem? Thanks for the help the other day too re the noisy fan.