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Check Diesel Fuel Supply Leak

Model: Renault Megane Megane 1 - Years: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Part: Checks and maintenance

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If the engine struggles to start, especially when cold, and runs unevenly once started, there may be a problem with low pressure in the diesel fuel supply system caused by a leak. To detect the leak, increase the pressure in the fuel supply system using the manual pump near the fuel filter: repeatedly press the pumping element until it resists and check the fuel lines; you can also disconnect the pump pipe and blow air at 1 bar using a compressor.


Updated on 12 February 2026 by ScegliAuto


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