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Cleaning Twingo III Phase 1 Fuel Injector Tips
AntonioTwingo and one other contributor
Last updated on Sep 2, 2026
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Introduction
Go to step 1 ↓This quick and very economical procedure will allow you to clean oil vapor deposits that may have accumulated on your injectors.
It does not require removing the entire fuel rail or disconnecting the fuel system, which means not a single drop of fuel will be lost during the process!
Tutorial shown on an H4D engine, applicable to the H4Bt engine.
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Unscrew the 6 screws by hand or with a T50 socket.
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Lift and set aside the engine hood.
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Unplug the connectors for the 3 injectors.
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Unscrew the two 8 mm screws securing the fuel rail.
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Pull the fuel rail assembly straight up to remove it from the intake manifold. Use slight rocking motions to help free it.
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Place a small drop of cleaner (e.g., brake cleaner) on the injector nozzle to be cleaned. Let it sit for a few seconds.
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Gently wipe the injector nozzle using a cotton swab.
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Repeat the process for each injector nozzle. You can optionally wipe the neck of the injector nozzles with a paper towel.
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Clean the injector wells on the intake manifold with a cotton swab to ensure a proper seal.
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Lubricate each injector seal (only the one on the intake manifold side) with a small drop of engine oil.
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Reinsert the fuel rail into the intake manifold. Ensure that each of the three injectors is fully seated in the manifold.
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First, tighten the two 8 mm screws by hand while holding the fuel rail in position. Then, once locked in place, tighten to a torque of 10 N·m.
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Ask FixBot
Congratulations! You now have perfectly clean injector tips, perfect for properly and evenly atomizing fuel!
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