Need a little help, my 97 gt 4.6 is running really rich, 10 - 11 mpg, I followed codes and changed all 4 o2 sensors, fuel filter, iac valve, fuel pressure regulator, maf sensor, air filter, cleaned throttle body ( this was the biggest help to date). It still searches for proper idle, still has some bucking on the highway ( not as bad as it was) fuel pressure is 40 without vacuum, 30 with, maf reads high though, 8 - 10 at idle, any reference info i can find tells me it should be around 5g/sec. Any thoughts?