IM HAVING THE SAME PROBLEM, I CHANGED EVERYTHING FUEL FILTER/PUMP,PLUGS/WIRES/COIL,TPS SENSOR,TEMP SENSOR,INJECTORS. I EVEN PUT A NEW AC DELCO MAF SENSOR ON AND STILL GOT THE SAME PROBLEM. I JUST ORDERED MAF TRANSLATOR BOX AND LS1 MASS AIR FLOW SENSOR JUST WAITING FOR DAYS OFF TO TRY IT...