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The 2014 Lexus IS350 reminds the driver that "injector maintenance" is required every 10,000 km.

Besides this advisory annoyance, as far I can tell there is no difference in drivability.

I don't think this is a case of Lexus being over-protective. The engine utilizes gasoline-direct injection, so I imagine that this message relates more to the high-pressure direct injectors.

Questions

  • What periodic maintenance do these direct fuel injectors need?
  • Is it out of the realm of a DIY-er to perform this maintenance?
Pᴀᴜʟsᴛᴇʀ2
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Zaid
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1 Answers1

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So, the IS350 actually utilizes both port and direct injection. This results in the IS350 having fewer carbon build-up problems than the IS250, which exclusively uses direct injection.

The dealer/shop procedure for this maintenance is, at best, to inspect the valves for build up. If you want to maintenance the vehicle as recommended by Lexus, take it to the dealer and have them inspect it and perform their mfg recommended work.

In my experience, you would do better to simply run a can of injector cleaner through every 10,000 km. At 40,000-50,000 km intervals you will still need to take to a shop for a cleaning. At that time, if the shop sees it necessary, they will sandblast the valves with an abrasive material like walnut shells to remove remaining carbon build-up.

justinm410
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