Arob27ss
New Member
I have a 1990 5.0 and currently out of ideas of what’s wrong. Put in a 130amp alternator in March and every time I turn the headlights on I can’t go above 2k rpms and about 55mph anywhere. It has electric fans with a digital control and when that kicks on with the headlights on its bogged down. So I took it in and the Mechanic said the alternator had a diode ripple so he warranties it out and got me a 200 amp one and replaced 4 ground wires with it and still Boggs down when the fans kick on. All the wiring is the right size and can’t find anything else wrong with it. It’s pulling 14.1 volts when fans kick on so there should be no issue on that end but don’t have a clue what else to do. Any help would awesome