Question about 2005 Renault 181

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Renault Modus 54 Plate 1.5 80dci dynamique

Display showing injection fault / Stop

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All 1.5dci engines (Renault, Dacia and Nissan) use Delphi fuel injector systems. These particular Delphi fuel pumps are very sensitive to the quality of diesel you use (oil quality and level in the engine seems to be a factor, too). Once the pump is damaged internally (partial or total seizure) fine metal dust from the pump gets into the system and damages one or more injectors. If you act early (while the engine still runs) you may get away with replacing the pump and the fuel filter. However, once the dust spreads around, you need to replace the entire fuel system, including the fuel tank. To prevent this from happenning (to a fuel pump that is not yet damaged) you need to use quality diesel with low sulphur content (diesel made out of Russian or Venezuelan oil have usually high sulphur content), diesel additives (STP, Castrol, Wynns or similar) and change engine oil and oil filter at least every 15,000km/12months (Nissan uses this shorter service interval and their 1.5 dci cars seem to have much less problems with fuel injection systems).

Posted on Sep 12, 2009

  • miro88 Sep 13, 2009

    Need to add a clarification about diesel fuels. Both the EU and the US have reduced the permitted sulphur content in diesel fuels. Ironically, sulphur was the key lubrication component of diesels made from oils with high sulphur contents and refiners using these oils have been probably slower to react to the loss of lubrication in their diesels. 1.5dci uses a rotary fuel pump that is lubricated by diesel itself. It seems that big chains of fuel stations in Europe (where turbodiesels are much more prevalent than in other markets) use additives that improve the lubrication of their diesels. However, some discount sellers may be selling diesel fuels without these additives. Also, the cheapest way to remove sulphur from the oil is to apply Hydrogen. This can cause fuels produced from oil treated in such a way chemically agressive etc. In other words, the best diesel fuels are usually produced from oils with low sulphur content and high chemical purity by the known brands (Shell, BP, OMV, Agip etc.). To be sure, it is best to use own additives. When using fuels from top brands, a lower dosage may be used than recommended by the manufacturer of the additive (to save money).


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If its lazy and sometimes smokey or chugging its the egr valve, very common.

Posted on Aug 16, 2009

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I had the same problem 3 times till now. The problem is very common and is due to one of the 4 pencil spark plugs-alternators

Posted on Aug 27, 2009

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