Can't seem to figure it out, my car starts to bog with a little less than half a tank. It feels like not enough fuel is getting to the engine. I've already replaced the fuel pump, and sending unit. My mechanic said it was a faulty gas gauge and recommened i change the instrument cluster thinking the tank was empty but reading half.. I don't think thats the problem since i filled up last night and only put in 7.2 gallons of fuel till it spilled out. so there was at least 4 gallons of gas in the tank. I drove it this morning with the tank full and no issues of bogging. Anyone have any ideas?