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How to Test and Replace Faulty Injectors on a Renault Clio

Model: Renault Clio MK 2, Clio 2 - Years: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Part: Checks and maintenance

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Video tutorial

To test the injectors on a Renault Clio, open the bonnet and loosen the high-pressure connectors, then activate the starter motor. Tighten the connectors through which the diesel flows.

Now try to start the engine by spraying brake cleaner into the air filter. A return flow test of the injector can detect any internal leaks, so disconnect the fuel return hoses, insert a cap on the high-pressure pump connector, and connect four hoses to the injectors.

Place the hoses in an empty bottle and start the engine; if the bottles fill with fuel, the injectors have a high return flow and need to be replaced.


Updated on 28 May 2026 by ScegliAuto


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by ScegliAuto

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