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Turbo whine when accelerator released


 
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Handyguy
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Joined: 15 Mar 2016
Posts: 13
Location: Warwickshire

PostPosted: Sat Oct 13, 2018 16:10    Post subject: Turbo whine when accelerator released Reply with quote

Hi all,

I asked this question in the 80 forum but no joy. 80 series 1994 12V 1HD-T Jap import.

Since I had a exhaust replacement (the front section with flexi joint) the turbo charachter has changed. When cruising at 50mph around 1600 revs there is a noticeable mid pitch whine.

When releasing the accelerator and allowing revs to drop back through the 1800-1400 band, there is the same noise.

It only happens once the engine is up to temperature.

Open to suggestions. I was wondering if air is leaking somewhere in the tubo system or EGR system. Maybe a union unseating slightly under pressure once engine is hot?

Extra challenging as I can’t reproduce the noise whilst at a standstill.

Cheers!

Guy
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PostPosted: Sat Oct 13, 2018 16:10    Post subject: Google Ads keep this community free to join!


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