Quick whining noise when shutting down car? (Sometimes when unlocking doors)

AlphaSnacks · 09-27-2011, 11:40 AM

The fuel pump engages because it's getting ready for you to start the car. This is extremely common on cars, these days. Like I said, high-performance cars do this where it's evident and you can hear it clearly. I have a video of my brother's R8 starting up, I'm standing a good 10-15 feet away and you can hear the fuel pump turn on as it whines during its 2-second engagement, right before he fires the car up.

Not all cars employ this, because some still rely on gravity fed fuel if the design makes it possible. But if a car requires a fuel pump, the fuel pump will frequently engage when the car is unlocked, so that you have an immediate start of the motor and keep wear on the starter to a minimum.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
BIZZARE NOISE..from unlocking doors	zrider	Exterior & Interior	21	04-16-2013 05:13 PM
Noise when Shutting off the car?? ANYONE?	bluntman5551	Nissan 370Z General Discussions	18	04-15-2013 03:05 PM
Whining Noise From Engine Bay	iviegatron	Engine & Drivetrain	8	01-26-2011 04:45 PM
Whining Noise - UPDATE!!!	jloomis13	Nissan 370Z General Discussions	6	06-04-2010 01:40 PM
Unlocking both doors simultaneously with door handle request button	Musashi	Nissan 370Z General Discussions	18	03-21-2009 03:59 PM

09-27-2011, 11:40 AM	#22 (permalink)
AlphaSnacks A True Z Fanatic Join Date: Jan 2010 Location: Windermere, FL Posts: 1,618 Drives: '13 XKR-S, '10 370Z Rep Power: 19	The fuel pump engages because it's getting ready for you to start the car. This is extremely common on cars, these days. Like I said, high-performance cars do this where it's evident and you can hear it clearly. I have a video of my brother's R8 starting up, I'm standing a good 10-15 feet away and you can hear the fuel pump turn on as it whines during its 2-second engagement, right before he fires the car up. Not all cars employ this, because some still rely on gravity fed fuel if the design makes it possible. But if a car requires a fuel pump, the fuel pump will frequently engage when the car is unlocked, so that you have an immediate start of the motor and keep wear on the starter to a minimum.