My 99 Clasic 4.0 cuts out for a couple of seconds if I make a hard left turn (90 degrees at 15 mph) when I have less than 1/4 tank of gas (never had it happen with a full tank). I'm afraid the answer is going to be "Fuel pump screen / filter /pickup" or some such but I thought I'd see if anybody had seen anything like this before digging into it.