it is a great thought to look back to the last thing you changed when you start having issues. did the issue start immediately after you replaced the fuel pump, or at some time "soon" after?
help! what year is your car? a '74 ?? or is it fuel injected, 1980.5+ ??
different wiring diagrams for different cars. and if it is not fuel injected and is not a 1974, then your electric fuel pump is not original equipment... and most likely has been poorly wired by the previous owner if you are constantly blowing fuses because of the pump.
also, what pressure is your new pump pushing? are you certain that you purchased and installed the correct type of pump. carbureted vehicles take a different fuel pressure than fuel injected cars.
a case of NEED MORE INFO, please and thank you.