254 amps isnt possible, 130 is the max on Fords, also hook up a voltmeter to the battery, read the volts, should be between 13.8 and 15.0, with all accessories on, if it's constantly higher, replace the alternator, the regulator is built onto the back of it, and if you know what your doing it's fairly simple to replace the regulator part and save some money. A rebuilt should cost about 150. So the addition is the shop labor? I did not see your post or I would have helped sooner, if you want detailed instructions to install the alternator let me know, but I will need to know which engine you have 3.0 3.0 24 valve, SOHC or dual overhead cams.
Tuesday, January 5th, 2010 AT 6:12 PM