a couple of days ago, I was driving in a hwy with the radio loud as usual until I realized a sudden loss of power and when I looked at the dash the blazer was overheating and when I turned off the radio I was able to hear the knocking like if the bearings spun over. I immediatly pulled over and the car shut off. I waited an hour for it to completely cool off while I was checking the oil. the oil was black and was lacking, so I walked over to the local gas station and bought a few cans, I poured in 2qts until it properly registered on the dip stick. so after it cooled down, i cranked it up and after a few slow cranks, it fired up and I quickly drove it to the gas station to fill it up with water and re-checked the oil. afterwards, everything seemed fine, no more knocking, or overheating issues, dont know where all the water went but it seems fine now. after a couple of days i started noticing a shake while at idle, at a stop sign, but if i put it in park or N, the shaking calms down, but once i put it into gear it shakes like a muscle car with a low cam with rough idle, but the wierd thing that while driving it on the street or hwy it seems fine, although it struggles a little at take off but then its fine. last night i briefly checked the engine and noticed that 2 of the 6 plug wires had cracks in the insulation, one had a deeper crack than the other, so i taped them up tight on the crack for the mean time as the local auto parts store was already closed. i'll be stopping by later to buy a new set of wires, im just wondering if its just the wires that are bad, or if I damaged the engine when it overheated.
BTW, its a 92 s10 with 4.3 TBI

thanks

 

bump, i would also like to see some help with this issue!

 

I would run a compression check on the engine to make sure that you haven't warped or cracked a cylinder head or blown a head gasket. Overheating like that is never good and you probably severely shortened the life of the motor in the process.

While you are doing a compression check, I would do a full tune up consisting of plugs, wires, cap and rotor to get rid of those cracked wires and to get the rest of the ignition system up to snuff.