I have this problem with my 92 Honda Accord. After maybe 15 mins of driving the engine starts to backfire and there is a loss of power. So the fuel pump is not pumping gas properly. But after 3 mins, the check engine light comes on (Error code 43) and the fuel pump runs fine. So my guess is this is an electronics problem. however, I don't know if the problem is the main relay or something else and I don't know the best way of checking the source of the problem.
Can anyone help?