Posted this on another page on this forum but did not get anything. Maybe I was in the wrong place? 92 5.0 70 mm throttle, 76 mm mas air with 19# sample tube . Cold air kit with K&N . Ported upper manifold to match throttle body, under drive pullys. All else on engine is stock. Bad idle problem after engine reaches operating temp and is at a stand still in drive. (It is an AOD) Say, if im at a traffic light to long idle will suddenly drop to the point that i have to "feather" the gas with the brake. I have cleaned the K& N , clean idle solinoid, new plugs, cleaned and re lube "salt & pepper". Adjusted TPS with volt mtr. to around .99. New cap and rotor. Ford racing wires not replaced. They are still fairly new and show no sighns of any wear. My performance shop pulled out a lean code in the computer and i had a "check " light befor he cleared it. Oh, cleaned the maf sensor also. Plugs were white as a ghost when i changed them which only makes sence with the lean code. Timing set to factory. Here is what I think the next step is and were YOU chime in and tell me what ever you think. # 1 Vacume (cheap to fix / hard to find) . #2 Injectors(OUCH!!) #3 Fuel pump ( I have a 190ltr) that I never put on brand new in box. I am really not comfortable with a fuel pump upgrade or injector upgrade(I bought a 24#set on e-bay) . As factory fuel sys should be able to handle 225 rear wheel horses that I have a dyno slip for. This car has 58 thou original miles . I love my car but this is FREAKIN PISSIN me off!!!! I have been at this for a month.