Why does my Subaru WRX backfire?
A bad mass airflow sensor, leaking fuel injectors, or a clogged engine air filter are common culprits of a mixture that’s too rich. A mixture that’s too lean in fuel can also cause a backfire. A bad fuel pump, clogged fuel injectors, or a vacuum leak might cause this problem.
What causes blow by Subaru?
This oil is also referred to as blow-by, and in moderation, it is completely normal. In a Subaru WRX for instance, it is completely normal for there to be a thin film of oil present on the intake plumbing, and for there to be a drop or two of oil pooled between the intercooler and throttle-body.
Why are WRX Sti so unreliable?
The WRX STI has had well-documented issues with its EJ25 2.5-liter turbocharged Boxer engine. There have been a number of lawsuits over premature engine failure due to a defect that allowed contaminated oil to carry “damaging metal debris through the engines,” according to court documents.
Is Afterfire bad for your engine?
Backfire is a condition described as a loud bang, poof, explosion, etc., while the engine is running or while shutting down. Afterfire occurs after the engine has been shut off. Note: Backfire and afterfire through the carburetor will not harm the engine at all!
Can blow-by Be Fixed?
Engine blow-by, smoke and oil use are related issues that, if ignored, can turn into very expensive repairs. Fortunately, in over 80% of cases this can be corrected at low cost, and without any downtime. Typically, blow-by is cylinder pressure leaking past the piston rings into the crankcase.
How do I stop Blowby?
The best way to minimize crankcase vapor pressure – blow-by – is to seal the engine as efficiently as possible from cylinder pressure. One way is to minimize ring end gaps by custom setting the end gaps on the top two rings to fit the way the engine will be run.
Why does my Subaru WRX lose so much oil?
Which is where some of the oil consumption comes from. You’ll loose a lot if your turbo seals are leaking or blown. I can’t see that happening on a newer car and you’d be able to see oil in your exhaust like previously mentioned. So, if your losing small amounts of oil in between oil changes then its just blow bye getting through your turbo.
What to do if your WRX is burning oil?
Keep the oil topped up. Read the manual cover to cover. It indicates when and how to check the oil, and what warning lights are available. It also indicates how to know whether those lights are actually working (by observing them during the turn-on sequence).
Why does my Subaru WRX have black spots?
The oil method is the oil creates a thin layer of film to keep the fins of the compressor wheel from rubbing the housing. Which is why people that run dirty oil for long periods of time or run low on oil can see the outside edges of the wheel look black.
Is there a low oil pressure light on a WRX?
Check the oil weekly, parked in the same spot, and with the motor at the same temperature. I prefer stone cold. There is no low oil level light. There is a low oil pressure light. It is not useful usually; by the time it comes on I feel it is unlikely the motor has not experienced significant wear.