Ok...been here before can't seem to solve this problem. I have a 97 Taurus with the 3.0 pushrod engine with 160K. The engine misfires, spits and sputters, lacks power. Checked the compression 150lbs on all 6. Changed the plugs (looked good) and wires,checked the egr, camshaft synchronizer, fuel pressure is 38 psi koeo 30 at idle 38 running down the road. No codes being set... changed the ect ...vacuum is 16.5 at idle and very steady holds 20 at 3,000 rpms.... rapid deceleration rises to 24, vacuum numbers show compression rings worn, but i would not think low enough to to make it miss like this?? Cleaned the maf, burns no oil. Don't know where to go from here. I heard these cars had problems with intake manifolds?? I am leaning on maf sensor, but just don't know. This is a second car and not used much...what am i missing here?