I have a 2006 Ford F-150 with a 4.6L engine. Recently it started dying when you came to a stop. I don't know what is causing it. Pulled the air filter out and replaced it and also cleaned the MAFS with special electronic component cleaner. The wires are intact on it and it looked good. When I ran it after this it was the same problem. Seems if you idle it and then rev it a little it will die when it comes back to an idle. Now I am begining to think that the MAFS is faulty or I could possibly have a bad oxygen sensor. However, I was under the impression that an oxygen sensor would make a light on your dash come on. No lights come on the dash except the battery light after it dies which seems normal. Now I am stumped and do not want to buy any sensors that I may not need.
Year : 2006Make : FordMake (other): F-150Engine: 4.6 Liter
Cleaned MAFS and replaced air filter
HiCustomerthis is lostrider,
~Has the battery been disconnected or replaced lately?
Yes, as a matter of fact the headlights got left on the other night and the battery was completely dead. I charged it for a couple hours and the started and ran the truck for an hour to charge. When the battery went dead it was like somebody had disconnected the battery, completely dead.
Thank you for the reply, since the battery went dead, the Processor lost its memory, so with the sludge build up in the electronic throttle body the processor cant relearn properly, there is a calibration update that needs to be done to the processor and then the throttle plate angle needs to be checked and if its out of range the throttle body will have to be replaced, there is a service bulletin for this concern and unless you have an extended warrenty that will cover the repairs it will be at your expense to have the repairs done, The dealer is the only place that has the ability to recalibrate the processor, here is a copy of the service bulletin, hope this helps.
Some 2004-2006 4.6L and 5.4L F-150 (excluding F-150 Heritage), 2006 5.4L Mark LT, 2005-2006 6.8L E-350 / E-450, 2005-2006 6.8L F-Super Duty (F-250 to F-550), 2006 6.8L F-53 Motorhome Chassis, 2006-2007 4.0L Explorer 4 dr, 2007 4.0L Explorer Sport Trac, 2006-2007 4.0L Mountaineer, 2006 4.0L Mustang, 2006 - 2007 4.6L 3V Explorer / Explorer Sport Trac / Mountaineer, 2006 4.6L 3V Mustang, and 2005-2007 Crown Vic / Grand Marquis / Towncar vehicles may exhibit one or more of the following symptoms: drive-away hesitation, loss of RPM on deceleration, difficulty starting, and/or idle RPM less than desired. Malfunction indicator lamp (MIL) may be illuminated with diagnostic trouble codes (DTCs) P0506 and/or P0505. These conditions may appear after battery disconnect, dead battery condition, or keep alive memory (KAM) reset. The symptoms may be due to engine deposits in the throttle leading to airflow less than desired.
Follow the Service Procedure steps to correct the condition.
ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.