I replaced the original fuel pump about 3 months ago because of erratic idle while idling at stop light and the horrible whining noise it was making. I bought a Delphi for the replacement. Low and behold it started making the noise again. I thought I bought a bad fuel pump. Replaced that one a week ago with an AC Delco. To my dismay the noise is back again. When I turn the car on in the morning it starts great and is quiet as ever. However, at the end of the day on my way home is when the pump starts whining again. It is a very noticeable noise coming right from behind the shifter. So is it the fuel pump or another issue? Please help!
