# @threepiece.us on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DVPFB8HlL7o
- **Gondola URL:** https://gondola.cc/posts/58014351-threepieceus-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/416325091b.jpg
- **Posted:** 2026-02-26T21:06:36.000+00:00
- **Account Owner:** threepieceus (@threepiece.us) — https://gondola.cc/threepiece.us

## Caption

Your FA20DIT is slowly choking itself to death and most people don't realize it until it's too late.

Direct injection might give us better power and efficiency, but it creates a nasty side effect - carbon buildup on intake valves that port injection naturally prevents. The FA20DIT in your WRX, STI, or BRZ is particularly susceptible because of how Subaru tuned the timing and fuel delivery.

→ Why DI engines build carbon faster than port injection
→ The real damage happening to your valves right now
→ Why catch cans and additives barely help
→ The only methods that actually remove buildup
→ Prevention strategies that work long-term

Save this before your next service - most shops won't mention this until you're already having drivability issues.

#ThreePieceUS #FA20DIT #WRX #STI #BRZ #DirectInjection #CarbonBuildup #SubaruProblems #EngineHealth #CarMaintenance #BoxerEngine

## Stats

- **Views:** 0
- **Likes:** 1,162
- **Shares:** 0
- **Comments:** 37

## Tags

threepieceus, sti, carmaintenance, boxerengine, wrx, directinjection, subaruproblems, enginehealth, carbonbuildup, fa20dit, brz

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