It is getting worse. There is an eith of a tank and the 91 suburban 454 stalls and bucks. If you go around a corner it starts acting up. I can always get to a station(so far) but it happened to my wife the other day. You can hear the fuel slosh, so it is not out. I replaced the filter, it didn't make any difference. I have the throttle body fuel injection. Could this be a bad pickup tube? I would rather not have to drop the tank.