ok poeple heres a good question for all of you my car runs good when the fuel tank is full when it get down past a half of a tank it runs like pure crap ive done put a fuel pump on it and i have no trash in the tamk either any one got a good answer for this?

 

Do you have a fuel pressure gauge that you can put on the rail to monitor if there is a drop in fuel pressure as the tank gets lower?

Could be a power/voltage drop issue going to the fuel pump. Maybe there is only enough juice for the pump to sip at your tank. Then as it gets lower the pump doesn't have enough juice to really suck up the fuel.......?????

Testing the voltage at the pump and the pressure at the rail would be my suggestion.

 

what would the volts be at the pump and how do i check this

 

The volts at the pump should be battery voltage. You will need a multi/voltmeter and the following procedure;

This is for a 94-98 Accord,

the procedure will be the same for testing on other models, However the locations of the connections may differ.