4x4 H.O.R.E.

I don't know if you have one but theres a 1/2"x4"long white porcelin piece with two wires attached to it ,and is on the drivers side I had same issue then it would fire up back fire and die. it got worse I replaced this and never had the problem a used one works fine it seems to control fuel pump and variese presser and then none at all if you don't have this piece dissregard