I picked up a spare for my Bronco for 100 bucks with a half full tank ..it is worth much more ..but ,,so what is the problem with your unit ?? power ?? poor mileage ..or no one that can set it up to work right ??mine was fine tuned and I am very happy with it..it has been on my truck 20 years ...and it is an impco 425 ..I also have a duel mix unit that I am gonna try ..