driving car and engine warning light came on,took to ford dealer and they said they could not read the codes because i put roush supercharger on and would have to take to roush dealer, called roush dealer have appt for monday, but was wondering if you guys ever had a problem with warning lights comin on because of gas tank not sealing properly no gas cap,ford dealer said should be a funnel in trunk push in and out a couple times may reset light if thats it,ANY WAY WHAT SAY U, CAR RUNS PERFECT STILL.