Votage issues with 2.9l 4x4

[Will webber1985]

Iam having votage issues got truck back from garge after having distributer put in. Was told to replace fuel filter because truck ran rough. But drove for awhile and realized wasnt fuel issue. The bucking got worse when I hit the horn. So i also tried turning lights on witch made worse. Same with heater fan. So any power draw on system makes truck buck and jerk bad. Took it back to garge to have alternator tested. Was told to replace so I did witch did not fix problem. So I cleaned all grounds up witch didnt help much if at all. Just this weekend my starter solenoid stuck open and wouldn't let starter disengage. So I replaced that. I cant figure this out and would love some suggestions on what could be causing this issue. Also truck has an internal votage regulator. Witch came with new alternator. Thanks for reading this and hope someone can help

 

[ericbphoto]

RonD has a great write-up on this. He'll probably post it when he sees this. In the mean time, you're going to need a voltmeter to do the checks. Sounds like your alternator isn't getting the right voltage to it's field. Is your battery voltage good? Does the alternator warning light come on?

 

[Will webber1985]

No light comes on and last time tested battery voltage was good when I replaced alternator. Even tried another battery. But same issue with that one. When there is more than fuel injection taking power. It acts up real bad

 

[ericbphoto]

Engine off:
What is your battery voltage?
What is the voltage at the small wire on your alternator?

Engine running:
What is your battery voltage immediately after startup?
What is your battery voltage after 4 or 5 minutes?

 

[Will webber1985]

Will let you know when get to tools thanks