My cel has been on on my 2003 f-150 xlt for a long time with the code (according to Advance Auto) being the o2 sensors, when it rains i get stutttering at high speed and poor gas milage and when it dries up it goes back to running fine onlu this time after the recent rain last weekend it has not stopped running rough. Any help would be appreciated.

 

Go to a dealer and have the codes read. They have a much better scanner. Then go from there.

 

Thanks, spoke to a mechanic friend today and i am going to do a few minor tune-up items and then if it's still there i will prepare for the worst.

 

Make sure you know what the codes are and common issues associated with them w/ respect to your vehicle so you dont get taken to the cleaners...

 

I replaced both front sensors, replaced the plugs and the overall stuttering quit for about 5 miles, the cel went out but is now back on so i had a friend do some checking and we pulled off each plug wire from the ignition box and found one cyl. not firing at all, which would explain the cel came back on and i really lost power. I hope this fixes things finally. Thanks for the help.