Hi joe, as I stated in the question, there is no check engine light. Truck runs great until this happens. Given the fact that there is no check engine light, it seems to me to not be a sensor or electronic issue, which leaves mechanical or fuel flow issues. The question if this is true is, is it the fuel pump or the gas in the tank, or the fuel filter which is on the fuel pump. Is there any way for me to determine what is causing this problem without replacing the $250.00 fuel pump?
Also as I stated in the original question, I changed the air filter and added octane boost and fuel treatment. That seemed to work for a month but now is not. Since then I have run the gas tank almost out of gas, the problems seem to get worse as I get lower on gas. I then filled it up and the problem returned with a full tank. The problem does not happen on my way to work, but happens on the way back in the afternoon. My work is downhill from my house. So this leads me to believe that something is in the fuel tank moving to clog the filter or it has something to do with the temperature being 50-60 degrees in the morning when I go to work and 75-85 degrees when coming home. What are your thoughts? The truck has 130,000 miles on it. Thank you for your help.
Thursday, October 2nd, 2008 AT 10:04 PM