my truck have problems

[87#184saleen]

so yesterday i started my 2004 cayenne s and it started to miss fire were the rpm was really going up and down so i changed the battery and it was doing it again so i went under the driverside and bang the tank with my hand and i heard the fuel pump went on suddently everthing was working correctly dont know what is it ...it might be my fuel pump getting stuck or what..lmk guys thanks.

[wvicary]

What engine codes do you have? If it was misfiring the check engine should have been flashing and it is not safe to operate the vehicle if this is the case.

[87#184saleen]

theres no engine code what i think happend i left my truck parked for a week on a empty tank i think its my driver side fuel pump it happend before but then it went away

[wvicary]

Left side fuel module contains the main fuel pump and filter. I would recommend replacing both the filter and pump and not operate the vehicle with low fuel levels.

[87#184saleen]

Thanks for the help im just going to replace both of them also any good sites with the pumps.