OK changed the timing belt and now have a bad vibration over 4000 RPMs, some one said the oil pump or silent shafts were out of time, how do you do that? All the timing marks are lined up. Wheres the plug you are to take out and check to see if everything is in line. Thanks '92 Eclipse GSX AWD 2.0 Turbo

 

id check the balance shaft pully, make sure its not about to go..............

 

1398's got it. It's most likely the balance shafts. Kind of a rule among the community, always check the balance shafts when doing a T-belt job. Most people just delete them all together, but it's a matter of opinion on whether it's good or not. There are kits available to remove the balance shafts from places like RRE or Buschur Racing, and they're under $50.