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.
I'd recommend you first determine whether or not you really need a rebuild.
Have you done a compression check?
Is it burning oil?
What do the spark plugs look like?
The problems you're describing don't sound like things that would be solved by an engine rebuild.
If your voltage is going haywire, that has nothing to do with how happy your cylinder walls are.
If your coil is going belly-up, that has nothing to do with how happy your piston rings are.
I have 160,000km on my 1998 V6 3.2 DOHC. And I hope the engine is as good as my Ford falcon 4.1 litre was, at 340,000km it was still going strong, no oil usage and no oil burning when I sold it.
I maintain my vehicles, but the Isuzi is a higher maintenace item than what the Falcon was.
one of my dads hunting buddies has a 87 trooper with 275k on it and it still runs good. but ask yourself if the truck is worth the cost of a rebuild to you. if not, its time to go down to the dealership