I don't know whats going on. I have a 07 FX4 SCREW and for some reason it is very slugish. It just started doing this when i drove from TX to WA. I had a 07 Explorer Sport that i Bought here in WA when i was stationd here before and when I took it home to TX it did the same thing. My question is Would the Altitude have something to do with it? Like my O2 sensors or something? Any ideas yall have to help me out would be awsome. Thanks

 

You will always have less power at altitude. The air is thinner. The only way to get the power back is with forced induction.

 

Right but it did the samething when i left WA and went to TX.

 

It can take a short while for the PCM to relearn. You could alway reboot it. Another thing is when leaving a high altitude area going lower the gas sold in higher altitude areas is lower octane because the air is thinner. When you get down to sea level you need to fill up ASAP.. Here in the Salt Lake area regular is 85 but in california and other lower altitude areas its 87

 

Disconnect the battery for about 30 minutes, then reconnect. See if it drives differently.

 

do you have an aftermarket air filter or intake? maybe clean the maf if rebooting the computer doesnt work.

 

No I dont have anything after market.