i have a 2001 F250 5.4l superduty supercab that i put a diablo sport chip with just the one tune and stock. can someone tell me what the positions of the toogle are? i feel the tune is the position opposite the notch, what is center and the notch side,which one is stock? i am having a engine stall problem when running and recently put it in the center position. it has never had this problem since i have had it , almost 2 years, put the chip in a little over a year ago. it starts right up after turning key off , i surely don't know that the chip has anything to do with it at all. my machanic put it on a diagnostic computer ,no codes. he thinks a loose ,open wire something to break power to the computer. i did read something about a bad chip causeing engine stall. this problem is very intermittent. anyway i would like to know what the positions are. thanks