Hey guys thanks for all the replys, as for the problem, it occurs at low rpms and not just at high rpms (even then i dont seem to get lift at those times: which may be a problem with the vvti??)...the throttle response seems to diminish on the days that i have the problem.. this happens on a weekly basis, i have to keep hoping if it runs better everyday.. as for the suggestion for resetting the ecu, i will try that asap and wil post back any changes thanks everyone