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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: 20092 ![]() ![]() |
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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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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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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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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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
It's an adaptive transmission.
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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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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20092 ![]() ![]() |
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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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20092 ![]() ![]() |
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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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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20092 ![]() ![]() |
Cheers Alex
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20092 ![]() ![]() |
Haven't used the car all weekend but this morning I decided to call LRA out
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20092 ![]() ![]() |
apparently, my LRA tech doesn't know his EGR from his Turbo |
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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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alanm Member Since: 09 May 2014 Location: kzn Posts: 2 ![]() ![]() ![]() |
Hi everyone
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