Hello all!
Its amateur hour here but I need help! HELP!

So I have a 2.8 or 2.9 out of a Ranger or Bronco II (not sure where the engine came from). When I drive on the flat it does fine as long as we are going 15mph or less. If I try to accelerate it dies, or backfires and dies. If I try to go up an incline it dies. I can put it in park or neutral and it revs just fine, step on the gas and the engine accelerates well, but put it into gear and accelerate and it dies.

So where to go from here???

Thanks in advance.

 

Need to know which engine?

2.8l would have a carburetor, seen here: https://therangerstation.com/tech_li...formance.shtml

2.9l would be fuel injected: seen here: https://therangerstation.com/tech_li...2_9_Page.shtml