Dual Fuel Tank Gremlins
I have a classic 110 (LHD, 3.5 RV8, dual carbs) with dual fuel tanks. The auxiliary tank is located under the front passenger's seat box. The aux tank's fuel pump was recently replaced, and the truck runs fine off of this tank. However, when I switch to the main fuel tank the truck will idle fine but any excessive amount of acceleration or running at high speed will cause the engine to bog down and lose all power (without completely stalling). Before placing some seafoam in the main tank, it would not even idle off the tank. I do know that the previous owner used Stabil fuel stabilizer in the tank approximately six months ago. What is really crazy is that when operating the truck in hot temperatures (it's been over 100 degrees recently here in Texas) the tank works just fine, and the engine seems to have slightly better acceleration. I suspect either a failing fuel pump, clogged fuel filter, clogged fuel lines, or maybe even a breathing problem. Any help in diagnosing this problem will be much appreciated.