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![]() | Home > Technical > Goes in Reduced Engine Performance on a long drive |
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IanMetro Member Since: 11 Sep 2017 Location: Somerset BS21 Posts: 3265 ![]() ![]() ![]() |
I had similar, it turned out to be Turbo Actuator (Sticking?)
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Spannerhead Member Since: 08 Jan 2021 Location: Bilbao Posts: 12 ![]() ![]() ![]() |
Thanks buddy I'll have a read...
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gasman Member Since: 02 May 2013 Location: Tyneside Posts: 917 ![]() ![]() ![]() |
As above, most likely carbon build up on the variable geometry ring in the turbo. Very common issues.
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Spannerhead Member Since: 08 Jan 2021 Location: Bilbao Posts: 12 ![]() ![]() ![]() |
Thankfully the turbo cleaner seems to have done the job. |
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gasman Member Since: 02 May 2013 Location: Tyneside Posts: 917 ![]() ![]() ![]() |
Good to know 😃 |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1459 ![]() ![]() ![]() |
Now use some decent fuel or additive to improve combustion and stop the carbon from forming! Also, you’ll need to vary the rev range more so that the vanes and actuating ring move through their full movement more often. |
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IanMetro Member Since: 11 Sep 2017 Location: Somerset BS21 Posts: 3265 ![]() ![]() ![]() |
BossBob, I did wonder if cruising for miles/hours at the same speed had something to do with my sticking turbo actuator problem. As it started to show up at the same sort of place each time.
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RoverRider Member Since: 29 Aug 2024 Location: Rosbery Posts: 10 ![]() ![]() |
Ooof, 9 hours in limp mode? That must've been rough. Glad you made it home safe. I'd be tempted to carry some turbo cleaner for long trips after that experience. Might save ya some hassle in future. |
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Spannerhead Member Since: 08 Jan 2021 Location: Bilbao Posts: 12 ![]() ![]() ![]() |
Yeah, it wasn't fun, I thought it might have been something to do with the available power from the engine so turned off the Aircon too, in 35° spanish heat! Luckily when I stopped, turned it off and on I could then drive ok for a while, until we hit another hill anyway!
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1459 ![]() ![]() ![]() |
I think that long periods cruising at the same speed or throttle setting can’t help when you’ve got a mechanism like the turbo variable vanes. You’d hope that the designer took the possibility of carbon deposits into account but it will also depend on all the other designers and regulators that cause modern cars to reconsume their own exhaust gases. My understanding is that the EGR only opens when the engine is hot enough and at constant rpm, ie on a motorway/dual carriageway and we all know how coked up the EGR system gets, so why not coke up the turbo variable vanes while we’re at it? |
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