[forextrader]

Hi,

First thing I would do is check the fuel pressure. Even though you say you changed the pump already I have gotten pumps and they quit a month later. Did you change the fuel filter? If not this can restrict your pressure a great deal if its partially plugged. If its popping like a backfire it would more than likely be a lean condition, hence not enough fuel, which is what it sounds like to me especially since you said the plugs look normal. If it were running rich they would be soot colored (black). Also I would check for vacuum leaks as well, particularly at the back part of the TBI unit where the vacuum lines are.