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Idles high when cold?


EJ208D

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what do you mean turbos dont work properly? depends on the oil in there and the tune also but even from factory i'm pretty sure most subi idle a bit higher than usual when cold but 1.2k seems kinda high.. wouldn't expect that in current ambient temps , atleast not if you're upper north island. wonder if your cars had aftermarket tune that changes timing/fuelling based on temp etc. for protection.

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Possibly a vacuum leak that stops the vacuum reservoir in the passenger front guard holding vacuum which controls the tt solenoid box which controls the turbos.Had this problem after a engine rebuild where the tards had trapped/pinched the vacuum hoses to the vacuum reservoir under the battery.

Edited by Dre
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If it goes back to correct idle then would there be a vacuum leak?

 

does it boost consistently once the 5 mins or so have past?

 

If you stop and restart the car while it’s still hot do you get another 5 min wait?

Could be faulty temp sensor in engine or gearbox.  

 

for other owners can you get full boost from dead cold?

 

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My old Bh tt didn’t have a vacuum leak,but because the vacuum reservoir hoses were pinched the reservoir couldn’t reach full vacuum,causing intermittent sync problems between the twin turbos.No check engine lights.Was suggested by a good Subaru mechanic to check vacuum hoses,especially the plastic pipe/hose that runs from the reservoir around the front of the radiator to the solenoid box.Maybe a small vacuum leak causing the reservoir to loose vacuum overnight.As soon as car started,vacuum replaced.These cars are getting old and require a lot of maintenance because of the complexity of the tt engine.Cheap to buy,expensive or time consuming to maintain.

My old Bh tt will make full boost from cold.I’m always telling my son to warm the car up first.

Edited by Dre
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