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I drive a new 2019 manual transmission Subaru Imprezza. Started driving her five months ago. She's only had one oil change. Synthetic oil before and after the oil change. She's been stalled less than 5 times total.

I noticed a few days after the oil change, on an uphill incline, she was skipping in acceleration. I was cruising in 5th gear, then dropped it down to 4th thinking she was simply losing power, then she started really dragging in 4th, and 3rd, and in 2nd gear. I parked her that night, next day she was driving fine.

It's now happened on and off in the lower gears, where she'll skip/won't accelerate/have a hard time accelerating, while I'm pressing the throttle down. I have yet to determine what the common denominator is, and what causes the skips. I feel it most uphill, and when I'm really trying to go. I never press the pedal all the way down. I don't ride the clutch, parking brake is off.

No lights are on, nothing's leaking, oil level is fine, no codes are being read. I took her back to the dealership, and they reported nothing back. The only thing they could offer is for me to leave the car at the dealership for some-odd days and go from there.

Any thoughts? I'm convinced it's computer related and not altogether engine related. I need something to present to the dealership, give them something to look at.

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  • Did you perhaps gets some bad fuel?
    – mike65535
    Jun 4, 2019 at 18:14
  • I considered that, however I haven't gone out of my way at a different gas station. I also haven't been mixing fuel types
    – cooperandmagic
    Jun 4, 2019 at 22:46
  • sounds like a fuel flow problem,get them to measure flow and pressure.if it is computer related a possible cause is a sensor giving the wrong value.
    – trond hansen
    Oct 30, 2020 at 12:12

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I had similar issues where my Mitsubishi Galant where a gear change would take ages for the car to get to the expected acceleration/ speed. Turned out to be a worn clutch. Replaced the clutch kit and all good. In my case had to replace the master cylinder as well as it was worn. Hope this helps :)

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  • Worn clutch is unlikely for a new car...
    – Solar Mike
    Jun 7, 2019 at 5:56
  • @SolarMike true but if you are not the first owner you never know how the car was treated unless bought it brand new.
    – Hasitha Shan
    Jun 7, 2019 at 6:32

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