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Home > Technical > Hesitating before changing gear (auto), then a sucking noise |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
that a good explanation, and sounds exactly what is happening under normal driving, but the sudden increase in noise level of this sound is either saying something amiss or broken, maybe the waist gate |
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20th Mar 2014 4:56 pm |
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steve t Member Since: 19 Jan 2013 Location: norfolk Posts: 128 |
Its the ECU telling the turbo to drop the power/torque from the engine to try give the smoothest gear change at the given rpm.
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20th Mar 2014 6:14 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
No wastegate on FL2 turbo... It's a Variable Geometry Turbocharger ( http://turbo.honeywell.com/our-technologies/vnt-turbochargers/ ). |
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20th Mar 2014 8:23 pm |
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kimosabe Member Since: 24 Aug 2012 Location: Rigil Five (Moonbase beta) Posts: 122 |
I don't get the 'training the gearbox' bit. Can someone explain it to me please?
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20th Mar 2014 8:33 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
It's an adaptive transmission.
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20th Mar 2014 8:50 pm |
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steve t Member Since: 19 Jan 2013 Location: norfolk Posts: 128 |
Ok maybe the wrong terminology for the new turbo so in your words Alex
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20th Mar 2014 8:57 pm |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
Today my car is making the same noise, but I'm sure I'm occasionally seeing black smoke out the back |
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21st Mar 2014 3:37 pm |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
EML lite up today
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22nd Mar 2014 11:29 am |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
It's safe to drive. You will occasionally get some black smoke.
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22nd Mar 2014 11:38 am |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
Cheers Alex
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22nd Mar 2014 12:08 pm |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
Haven't used the car all weekend but this morning I decided to call LRA out
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24th Mar 2014 10:20 am |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
apparently, my LRA tech doesn't know his EGR from his Turbo
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24th Mar 2014 2:16 pm |
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Kingston_dan Member Since: 23 Apr 2014 Location: Norwich Posts: 1 |
I have been having what I think are the same issues. I had the gear changing noise for the last year, sometimes worse than others but I have been learning to ignore it!
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23rd Apr 2014 9:48 pm |
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alanm Member Since: 09 May 2014 Location: kzn Posts: 2 |
Hi everyone
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10th May 2014 3:47 am |
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