JOHNNYPINEAPPLE

Hello. I have a 2010 F150 5.4 L 4x4 with approximately 62k miles on it. Occassionaly, I am encountering a problem with my truck. When I come to a stop, the idle drops below 1k and then stalls. This doesn't happen all the time, but often enough to be of concern. I removed the throttle body and cleaned it thoroughly. I replaced the right bank O2 sensor, but only removed and cleaned the left bank O2 sensor. Does anybody have any ideas about what could be causing this? I am at a loss. Thanks.

Marc D

Check/clean your MAF sensor in the air filter housing. It could also be a problem with the throttle position sensor. You would have to have a shop confirm this unless you have a diagnostic computer. Changing your O2 sensors will only help the computer adjust the fuel mixture not necessarily set idle. A bad O2 sensor will give you a P0174 or P0175 code. In the mean time add a can of SeaFoam to the gas. Great stuff. Good luck.

hockey freak 2715

I have had this nightmare for a while now. The dealer replaced the throttle body, o2 sensors, spark plugs and finally they replaced the purge valve assembly. Has been running well again.