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Old 30th October 2016, 22:21   #16
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Default Re: Fuel Slosh sound, after a full tank!

How sure are you about completely full?

Fuel vapor and air pockets in the tank will cause a not quite completely full tank for example, which is why to fill up 100% completely some long distance cabbies rock the car a bit while it is being filled - just like a doctor taps his syringe to ensure that the entire space inside is occupied by injection liquid rather than air bubbles.

Note also that the volume of petrol or diesel expands in the sun's heat and slightly contracts in colder conditions.

Still not a good idea to fill the tank 100% completely as there's much higher chance of fuel spillage etc as I mentioned.

Last edited by hserus : 30th October 2016 at 22:24.
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Old 30th October 2016, 23:03   #17
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Default Re: Fuel Slosh sound, after a full tank!

Reminds me of this strange problem we had with the Micra. Used to get this sloshing sound frequently and I always thought it was the fuel and ignored it. But none of the other cars at home including hatchbacks had this, I mean, never noticed the sloshing sound so frequently in any other cars. Few months back when I took Micra for service and went for a test drive with the SA, he said that's the sound of the faulty rear suspension and got it replaced under warranty. The sound disappeared. But since yours is a brand new car, chances are less this could be the problem. Still, just for awareness sake, that's one more cause for sloshing kinda sound from the rear. Strange but true.
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Old 31st October 2016, 07:26   #18
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Default Re: Fuel Slosh sound, after a full tank!

Or just rain water that collected somewhere in the car and is splashing around.

If that is the case better get it cleaned out to avoid a mosquito problem.
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Old 31st October 2016, 08:50   #19
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Default Re: Fuel Slosh sound, after a full tank!

Quote:
Originally Posted by GTO View Post
If it bothers you, just crank the stereo volume up . This is one of the reasons you'll never hear me complain about rattles.
This was suggested to me also by a Maruti Service Engineer, when complained about the sliding door rattles in my Omni in the 90s.
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Old 31st October 2016, 09:58   #20
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Default Re: Fuel Slosh sound, after a full tank!

I wonder if the Germans would have such "resourcefulness" when it comes to solving such problems. Im assuming they will get to the bottom of it even if it means removing the entire door and reassembling it with new rubber parts.
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Old 3rd November 2016, 17:53   #21
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Default Re: Fuel Slosh sound, after a full tank!

Quote:
Originally Posted by hserus View Post
How sure are you about completely full?
d.
I guess so. I filled a couple of litres extra after the auto stop.

Quote:
Originally Posted by GTO View Post
I guess most modern cars have baffles in the fuel tank to prevent fuel from sloshing around.

I hear it in my Jeep because of the fuel tank's position (under the front passenger seat). Don't hear it in my other cars though. The sound might depend on the fuel tank design (baffles), cabin insulation, fuel tank position etc.

If it bothers you, just crank the stereo volume up . This is one of the reasons you'll never hear me complain about rattles.
Now I am on half tank, and dont hear this anymore. Could this be a defect with the fuel tank? As few people have mentioned, I have never come across this in my previous cars. Or again, as you mentioned, could be an issue with the fuel tank position of Ecosport
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Old 3rd November 2016, 18:05   #22
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Default Re: Fuel Slosh sound, after a full tank!

I always fill till auto cut off and then a top up (I make them pull out the nozzle for this) to reach a full tank. Never heard any such sound so far. Car is Alto, 35 litre tank.

Last edited by Gansan : 3rd November 2016 at 18:07.
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Old 4th November 2016, 10:15   #23
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Default Re: Fuel Slosh sound, after a full tank!

Quote:
Originally Posted by joseph5600 View Post
Hi, I couldn't find an existing thread for this, so creating a new one. I bought a new Ecosport diesel last week. Everything was okay since delivery. The day before yesterday, I filled up the diesel full tank. Henceforth I am hearing a fuel slosh sound from the rear while braking. Is this common?
Quote:
Originally Posted by TheStranger View Post
The Fuel Slosh sound is a normal thing....a minor irritant...you will soon get used to it. it usually happens on a full tank and slowly decreases in intensity as the tank empties.
Normally a full tank will not have so much effect as a slack (partially full tank).

Quote:
Originally Posted by GTO View Post
I guess most modern cars have baffles in the fuel tank to prevent fuel from sloshing around.
Sloshing is one of the reasons for baffles. The other is free surface effect. May sound insignificant but it does play a big part in affecting the handling. I know this because we normally use much larger fuel tanks where the effect is noticeable.

https://en.wikipedia.org/wiki/Free_surface_effect

http://www.iitk.ac.in/nicee/wcee/art...E2012_4672.pdf

https://www.google.co.in/url?sa=t&rc...ZjwV7hxCOu7IkA

The article is on ships tanks but the principle is the same.

Last edited by pedrolourenco : 4th November 2016 at 10:19.
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Old 12th November 2016, 12:08   #24
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Default Re: Fuel Slosh sound, after a full tank!

Took my car to Elite Ford to get this checked. They said that this is not common for Ecosport. As this is something where they would probably need to replace the fuel tank and check, they suggested to get this done during the first service. Will keep you posted once this is done.

this is sometimes getting really annoying....
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