1996 Gvoyager still poor fuel mileage, changed plugs,wires,both O2 sensors,fuel pump and filter, replaced air box with hose directly to throttle body and No improvements. Still 17-18 mpg. So maybe TCM, throttle body or injectors. Van runs fine 107,000miles

How is your oil consumption?
Oil is fine, 1/4 per 8000 miles 20/50 mobil 1