[TBIDDY83]

Hello everyone. Well i am getting pretty upset with my focus. I have put toms tune on it, i have changed the plug wire, coil pack and plugs. It still dies sometimes when coming to a stop or get very sluggish. So what else can i do to get rid of this problem. Thanks

 

[SVTsurfer]

Is the check engine light on? codes?

 

[RhodySVT]

Fuel filter possibly, maybe front o2 sensor...mine has never done this so obviously there is something wrong

 

[Hillyard]

Hey have you been using your a/c a lot. I see you are from Indiana. What part?

I have the JRSC BBK and sometimes when I coast up to a stop light and don't downshift it will die after I have had the a/c on and then turn it off. I usually have all the windows down and the sunroof open and just use a/c to get the in car temps down.

 

[WD40]

Moved to "Ford Focus Technical Chat".

Grab your Predator and check for codes should be your first plan of attack.
You may also call Tom (whom you got the tune from) and see if there's something you can datalog so he can help to diagnose the problem.