pretty much since i have had it. The voltage goes haywire then it will just die. Had the charging system checked at 3 places, and they all say it is good, had the starter rebuilt due to slow startup, didn't help, replaced the fuel filter and changed the oil. Still I can't go around town maybe 10 min. it will lose all power you can floor it and it won't go over 30mph, then it will kick in and work. 1week after oil change the oil is already as black as night. I am worried i bought a dud truck, the rest of the truck is great, new motor and i'm sure i'd be rocking for many miles, but what does the rebuild generally cost??? Thank you.