2011 subaru legacy stalls on idle and stop only. No engine light on
- Thread starter Bobby63
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When was last time you changed oil. Also could be an indication of the torque converter fail. My .02
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If its not that it could be an intake thing, check your air filter and try unplugging your maf sensor. If its unplugged and doesnt change the problem at all it may be the sensor. I had this issue with my 08 impreza when i tried throwing a cheap cold air intake on lol. No codes but it obv wasnt breathing right. And i see the legacies had a torque converter recall so yeah, prob worth checking into
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Unplugging it is safe, its just to see if the problem changes while unplugged. Of course plug it back in when youre done testing. Im not sure on the recall, ive just seen several posts about it on this forum before. Id check them out if i were you. Good luck!
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My 2017 legacy would idle rough and often stall when shifting into reverse or drive or even just while idling in gear. I tried all the fixes but ultimatly it was the torque converter that was the failing point. Lifted the engine and swapped it myself, ended up spending around ~750 for everything. Afterwards the car was running perfectly. I would definitely try cheaper fixes first just incase it isnt the torque converter. But from the information im seeing I can positively say that the torque converter is probably the culprit here.
Check your throttle body and make sure it's not dirty, sometimes carbon builds around the inside of it and blocks it from opening small amounts during idle and low RPM's
Edit - to add I recently learned about this with my 2010 legacy, during idle and low rpm the throttle body opens slightly to allow air into the intake manifold but when it gets blocked with carbon build up over time that carbon blocks the plate inside the throttle body from opening enough to let air through which causes it to run rich during idle, this might not be the case in your instance but it's worth checking, throttle body cleaner and a new gasket was about 30 dollars direct from subaru
Edit - to add I recently learned about this with my 2010 legacy, during idle and low rpm the throttle body opens slightly to allow air into the intake manifold but when it gets blocked with carbon build up over time that carbon blocks the plate inside the throttle body from opening enough to let air through which causes it to run rich during idle, this might not be the case in your instance but it's worth checking, throttle body cleaner and a new gasket was about 30 dollars direct from subaru
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Some stuff you can try before proceeding with torque converter. Test your MAF sensor, Check and clean your EGR valve, Idle Relearn Procedure, Check spark plugs??, test your alternator, check and clean your throttle body (you can do this before idle relearn), check your transmission fluids, and check your air filter. And I also was adding fuel injector cleaner sometimes while filling up the car even though its kind of a long shot. None of these did anything for me because it ended up being the torque converter.
Agreed! Cleaning the Throttle Body fixed a couple issues on my 2000 and 2014 when quirks started happening