Horrible Gas Mileage
I have a 2002 manual transmission V6 Mustang with 58,000 miles. I don't beat on it and regular maintenance is performed. Lately I've been having some problems. This winter, it began to flood and would not start. Therefore, my mechanic clean all spark plugs, air filter, fuel filter, and adjusted the throttle because the idle was off. My idle has continued to be off and gas mileage has been horrible (it was 23 per gallon, now it's under 18). The idle sometimes goes from 1500 on startup down to almost 0 then back up, and at some point it figures out where it wants to be. Also, there are times when it seems like I'm pushing the throttle because the idle is so high.
Anyway, tps checked out, 02 sensors have been replaced, spark plugs cleaned, air filter cleaned, and fuel filter cleaned. After reading these forums, my assumption is that next I need to check EGR valve, MAF, and the idle control sensor. Am I missing anything?