2000 subaru legacy b4: car blowimg ploooms of smoke out exhaust and running rough, wont idle and keeps losing all power as if battery was dead. problem accured after i was accelerating through 160km/h in 3rd gear in second turbo range. car has lost most of its power. can u help????
I would suggest checking the coil packs and plugs - you could a melted plug or the coil pack/packs could be cracked so running on 3/2 cylinders at certain rev ranges. Clean the MAF on the air intake too.
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Expect to hear your head gasket needs replacing, at a minimum. White smoke means it's burning coolant. How much it will cost I can only guess, but usually a head gasket repair- a few hundred dollars-it's pretty time consuming and labor intensive, especially with all the turbo stuff that could be in the way. Good luck.
Oil leak will not change run temp but can cause a fire. The smoke is the oil burning on the engine. The 1st thing you need to do is clean the oil off the engine. Next top oil off to the full line on the dip stick.Now start the engine hold idle up to around 1600 rpm for 1 to 2 minutes keep engine run and look for the oil leak. Don't get caught in any moving parts and things will be hot so be careful. Most likely from your valve cover.
Hello, that is a puzzler, but the blow off valve opening up at an idle is making me think exhaust/catalytic converter restriction causing to much back pressure. Like it can't get the air through fast enough so it's backing up in the intake. I would start my chase there... Let me know if you find any thing...(subyguru)...
SOUNDS LIKE YOU HAVE IT NARROWED DOWN TO THE EXHAUST SYSTEM.THE CONVERTER IS PROBABLY PLUGGED,CHECK THE TEMPS. COMING IN AND OUT.THEY SHOULD ONLY BE A FEW DEGREES DIFFERANT,IF THEY'RE ALOT HIGHER COMEING OUT IT'S PLUGGED.
If you find that the engine is dying at intersections and runs a rough and fluctuating idle at start up, and you also sometimes lose power even though the engine is running then it is probably your Air Flow Meter or sometimes reffered to as a Mass Airflow Sensor. Eventually, as the AFM deteriates further you will no longer be able to start the engine as the ECU can no longer get accurate flow readings to work out air fuel ratios and shuts it all down to stop damage occuring. 2 ways to fix, replace AFM or upgrade your ECU to one that is capable of running MAPs for air fuel ratio, rather than using a sensor. Hope this helps.