TerryWag

Problems with Renault Modus Diesel 2005: Engine problems and poor fuel consumption - experiences and solutions wanted

RENAULT

Modus

| 2005 | | Diesel

Stalling while idling

Strong exhaust smell

Jerking on acceleration

Loss of engine power

Poor fuel economy

Unsteady engine

Black smoke from exhaust on acceleration

Engine shuts off by itself

Check engine light on

Hi guys, I have a problem with my 2005 Renault Modus Diesel. It has been showing strange symptoms for a while now: black smoke when accelerating, the Check Engine light comes on, the engine dies, loss of power, uneven engine running, jerking when accelerating, poor fuel consumption, strong exhaust smell, it cracks when idling. I suspect it could be due to a fault in the fuel composition. Has anyone had similar experiences and can give me tips on how to isolate and rectify the problem? I am particularly interested in how you have solved the problem in the workshop and what experiences you have had. Thank you in advance for your help!

(Translated from German)

4 comment(s)

BranderPete

Hi, I had a similar problem with my 2003 Renault Scenic Diesel. I have some experience with cars, but I'm not an expert. In the end it was a faulty cable/plug, which I had fixed at the garage for 95 euros. The guys there were super helpful and found the fault quickly. You could also have such a cable problem. Could you give me more information about your car? E.g. mileage, whether you've had similar problems before and how long the problem has existed? Then I might be able to help you more precisely. Just an idea, but maybe it could be the same fault.

(Translated from German)

TerryWag (Author)

Hey, thanks for your quick reply. My Modus now has 105029 km on the clock, and I've had this problem for about a month now. Before that it ran without any problems. Your tip about the faulty cable/plug sounds interesting, I'll have to take a closer look or take it to the garage if necessary. Thanks for your advice in any case, I wouldn't have thought of that now!

(Translated from German)

BranderPete

Hey, no problem, you're welcome! A month is quite a while for such severe symptoms. But your car doesn't have that many kilometers on it yet. With that kind of mileage, the engine can have many different problems, not just the cable/plug. It could also be the turbocharger that is causing these symptoms. Check the turbo pressure. If it is too low, this would be a sign of a defective turbocharger. The cost of replacement is usually around 1000 to 2000 euros, depending on where you have it done. Be sure to also check the intercooler nozzle, as oil can collect there if the turbo is defective. If you don't find anything there, it could well be that only the cable/connector is broken. Above all, however, I would recommend taking it to a workshop if you are unsure. They can read out the fault memory and tell you exactly what the problem is. As a layman, you often make things worse just to save a few euros. Safety first.

(Translated from German)

TerryWag (Author)

Hey, those are really good points, thanks for the tips. I will definitely check the turbo pressure and the intercooler nozzle. As I'm pretty unsure, I'll probably also take my car to the garage and have the fault memory read out. You're right, I don't want to make things worse. The cost of a new turbocharger is really high, I hope it's just the cable. Thanks again for your help and tips, I really appreciate it!

(Translated from German)

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