'93 4.0 - Horrid MPG help

[Jon-VH]

I've scanned the posts here & come across some tips on bad fuel economy in general, so now I have my list to run through. However, I was wondering if anyone else with an older 4.0 (OHV?) motor has experianced 8-9 MPG? If so what was the fix? My recently aquired '93 Explorer seems to run fine to great with only 102K miles, automatic tranny. But what would cause such a huge drop in fuel effeciency? My list so far: Fuel & air filter, Plugs, MAF sensor, tire alignment & inflation, Catalytic conv, Engine temp, Bad torque conv, non use of "OD", O2 sensors, Injectors, timing, Vacuum leaks, Choke, Fuel pressure regulator Thanks in advance for any input. Jon