Review on 🚀 Upgraded Delphi FG0347 Fuel Pump Module for Improved Performance by Chris Jens

Injecting gas at a pressure that doesn't meet Buick specs will cause the car (with new AC plugs, wiring and all) to vibrate slightly at idle. It's very light, I can hardly feel it on the steering wheel, but it's never been there. However, the old pump was very noisy and only makes a little noise when ignited. I'm sure it will last a long time but a bit of vibration is a bit annoying. The mechanics are very reliable, I checked all the codes etc. It depends on the pump.