Guys it just doesn?t have power, especially 3rd, 4thand 5th gear .Computer, plugs/wires, coil packs, cam sensor , map sensor ,compression and erg valve all check good .It seems to load up and be balky. I must down shift to 4th to maintain speed on some pretty easy hills here in western Kentucky. I?m guessing distributor/vacuum advance .I forgot to ask my mechanic if or how those checked out . What do ya?ll think? Thanks Joe Layson
I would also check fuel and air filters as well as fuel pump volume and pressure.
Don’t overlook a plugged catalytic converter.