jaja Posted June 18, 2022 Share Posted June 18, 2022 Hi everyone, My Forester started to leave behind a big cloud of smoke. From the distance the smoke seems to be blue but at the exaust is more gray / black. The engine seemed to stuterd briefly and for a second had a rough idle. Any ideea where sould I start the diagnostics? Quote Link to comment Share on other sites More sharing options...
Subaru euro 4 Posted June 19, 2022 Share Posted June 19, 2022 21 hours ago, jaja said: Hi everyone, My Forester started to leave behind a big cloud of smoke. From the distance the smoke seems to be blue but at the exaust is more gray / black. The engine seemed to stuterd briefly and for a second had a rough idle. Any ideea where sould I start the diagnostics? Hi Jaja - check all pressure hoses from the turbo through to the inter cooler and then the small pipe from the inter cooler to the throttle intake manifold. It could be that you have a split in one or few of them meaning that it’s over fueling as it thinks it’s getting more air than it is into the engine. Take them all off and have a good look. Easy enough to do👍🏻 Quote Link to comment Share on other sites More sharing options...
jaja Posted June 19, 2022 Author Share Posted June 19, 2022 Thanks Asikingforit. already did this because the turbo was rebuild recently but i will check the pipes again. The EGR Valve was also cleaned. Anything else i can check for? Quote Link to comment Share on other sites More sharing options...
Mr B Posted June 19, 2022 Share Posted June 19, 2022 Does it use any engine oil ? Have you removed some turbo/intake pipes and check no oil in the intake from the new turbo ? Seems new turbo fitted issue could be linked to that spanner work or turbo such as boost pressures etc ... Quote Link to comment Share on other sites More sharing options...
jaja Posted June 19, 2022 Author Share Posted June 19, 2022 at the moment it's difficult to say but i's asuming it's burning oil. Actually the reason why the turbo was rebuild is that entire intake system was soaked in oil. At this point i'm assuming that some piston rings or pistons are gone but i don't want for the moment to open the engine and I'm trying to exclude other causes. I think i will clean again the intake system and the manifold and see what happens Quote Link to comment Share on other sites More sharing options...
Mr B Posted June 19, 2022 Share Posted June 19, 2022 Don't rule out rebuilt turbo (new or refurb does not always=good), I seen plenty issues with newly installed turbos . Full in depth inspection of EGR , engine breather and a leak down test might be very helpful if engine suspect . Quote Link to comment Share on other sites More sharing options...
jaja Posted June 21, 2022 Author Share Posted June 21, 2022 Thanks Mr. B for your answer. At the moment i'm not ruling out anything. Where is the engine breather located? Quote Link to comment Share on other sites More sharing options...
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