Engine Stall Problems of Subaru Impreza Wrx

The vehicle stalled at highway speed as I began to decelerate on the interstate highway. I attempted several times to restart the engine until the vehicle reach a rolling stop in the middle of the 4 lane highway. I turned on my hazard lights and after approximately a minute I managed engage the engine for a brief period to reach the shoulder of the highway before the engine stalled again. There were no indicators or warning lights on. I tried several times to start the engine with no success so I called for service. After waiting for 30 minutes, I tried to start the car again; this time the rpms stayed normal. I drove to the car dealership for service. On the first day the technicians were able to replicate the issue but could not identify anything wrong with the vehicle. The technicians tested my fuel octane and electrical system. The technicians then ran a full diagnostic test on the car and still they could not find anything. My vehicle has been with the Subaru technicians for 6 days and so far the problem is still unknown.

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2015 wrx 2. 0l manual transmission while driving the car in everyday situations I have had (3) distinct problems associated with the engine/throttle/idle. 1) ghost blip: when coming to a stop, around 5-15 mph, put it in neutral coast to a stop idle will inexplicably spike from ~700rpm (idle) --> ~1. 2-1. 5k rpm (for a second or two. . . Like a ghost blipped the throttle). No pressure applied to accelerator. 2) rough idle: while sitting at a stop, in neutral, ~700rpm (idle) --> will dip to ~650-600rpm for a fraction of second & reoccur every 2-4 seconds. Feels like someone lightly shaking your seat from left to right. 3) near stall: while sitting at a stop, in neutral, ~700rpm (idle) --> will dip the rpms low enough that the whole car noticeably shakes. . . Similar to the shake you would experience if the engine were actually about to stall. The rpms will fumble around a bit and then hiccup back to normal idle after 4-5 seconds. All three items have been brought to the attention of the local Subaru dealer on (2) occasions w/ the reply unable to diagnose problem and/or it is normal.

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