I have a '94 Suburban 2500 Series w/ 454 Big Block TBI.

Last night I was driving to a local burger stand around the corner and as I was riding up the street my truck suddenly started bucking, as if I took my foot off the throttle and half-gassed it 3 quick times. Then, as I pulled into the parking lot it suddenly died. I restarted it and it was idling erratically between 500 and 1500 RPM as if it were struggling to stay on. I parked it and before I even touched the key it shut itself down. I then restarted it and gave it a few revs and it kept hesitating before it hit 3000 RPM and would suddenly die. So I had it towed home and the next morning I got my camera and recorded its symptoms.

Here's the YouTube video:
I'm fairly new at diagnosing mechanical problems, but my knowledge of how engines work is decent. I'm thinking one of the two injectors on the throttle body have worn out and is dumping way to much fuel into the system, causing it to flood and stall out.

So what do you think? Also, how much do you think this fix might run me? (dealership price or otherwise) Thanks for reading.

 

Alternator looks ok looking at the amp guage. Is it blowing black smoke? Can you get a code?

 

No, in fact it was white fog coming out. Mostly unburnt fuel, I'm assuming. Strong smell of gasoline. And I don't have the equipment to read the codes, but my dash is lit up like a christmas tree so I'm sure it's throwing many.

 

White or what appears to be just cold exhaust? If it is white smoke, you have an issue with water/coolent in the combustion chamber. That would cause issues that you have.

 

It appears to be cold exhaust to me.