Ok.. maybe someone can help me before I take my tahoe out and set it on fire... Tahoe runs fine, except on long trips. After about half a tank of gas, and a long trip, it starts to bog down at acceleration. It acts like its losing fuel. The more I accelerate, the worse it gets. BUT if I stop and kill it for about 15 minutes, then it will act fine. So far, this has happened only during hot weather but Ive never taken a trip in the cold.. I just bought this tahoe used not too long ago. NOW, when this all happens, I can tell you the temp gauge is running temp of about 193 degrees. The battery levels are normal at about 14 amps. My oil guage is somewhat normal of 40-50 readings. (fuel guage never has worked but I use my OD reading to stay on top of it.. its usually around 140 miles after filling up when this all happens (give or take a few miles). For my tahoe thats just under half a tank of gas. NOW.. weve changed the fuel filter, fuel injectors, replaced all gaskets at manifold (while doing injectors), fairly new battery, supposedly new fuel pump (from previous owner and isnt very old), new plugs/wires, new temp sensor, new thermostat. Everything Im reading says my fuel pump is the culprit... does anyone else have this issue and know what to fix next? ---------- Post added at 07:17 PM ---------- Previous post was at 07:14 PM ---------- Oh, new radiator and hoses, new oil coolant lines (including tranny coolant lines).