First we have replaced the catalytic converter when it wouldn't accelerate. Then we replaced the coil pack when it would stall out. The whole time when you put gas in it, it stalls out and idles very roughly. If you leave it on pumping, it stalls. When you turn it off to pump, you crank it and have to floor it a few miles and it straightens out. Any ideas?

 

I have the same issue just a few days ago, and i have check almost everything and everything seems normal and i found out at last that the battery cable is not tight firmly enough. When I tight the screw in my battery cable everything works normal again.

 

You let the engine run while you pump gas????!!!!!!