Check to make sure all the plug wires are tight on the plugs. Had one pop loose on my Accord once... it was drivable, but the loss of power and the sense of wrongness was definitely there. Are your belts properly tensioned? Any chance they might be slipping?

Good luck with it! <img src="/forums/images/graemlins/kewl.gif" alt="" />

Eric W.

'89 Dodge Raider -- 3.0L V6, MT, SWB