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Discussion Starter #1
Hi. My 2014 Forester exhibits rough start and one backfire when the engine is cold. I just bought it wit 72k miles.
Before I drop a bunch of money on replacing parts, does anyone have an idea what may be the issue?
Thanks.
 

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2018 X3 M40i / 2014 VW Passat TDI SEL
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1,618 Posts
Bad fuel injectors. Probably carbon buildup with poor spray pattern and weak atomization so the unburnt fuel after fires.

The cheap option is to try running a quality fuel injector cleaner through it for a couple tanks. Try 104 fuel injector pro. If that doesn't change anything for the better time to start planning for more work and money being thrown at it.
 
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