annaflamme7
Renault Movano Reduced Engine Power
Summary of the thread
The Renault Movano was experiencing reduced engine power, a check engine light, rough running, higher fuel consumption, and jerking during acceleration. The initial suspicion was a rich running condition potentially caused by a defective fuel injector. Other possible causes discussed included a faulty Mass Airflow (MAF) sensor or a vacuum leak. After taking the vehicle to a workshop, it was confirmed that the issue was indeed a defective fuel injector, which was repaired, resolving the problem.
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4 comment(s)
annaflamme7 (community.author)
Thank you for the quick reply. I have not yet examined the MAF sensor or checked for vacuum leaks. How would I go about testing the MAF sensor and identifying potential vacuum leaks in a Movano?
andreasschneider9
Alright, testing the MAF sensor usually involves using a multimeter to check its output voltage or frequency while the engine is running. There are plenty of videos online showing the correct values for your engine. As for vacuum leaks, a mechanic uses a smoke machine to pump smoke into the intake. It'll come out anywhere there's a leak. Honestly, with all those symptoms, and considering the potential impact on the catalytic converter, it would probably be best to get it checked out by a workshop. They can do a proper diagnostic and pinpoint the exact cause of the rich mixture. You really don't want to risk damaging your catalytic converter with excessive fuel.
annaflamme7 (community.author)
Thank you for the information provided. I took the Movano to a workshop, and it was indeed a defective fuel injector. The repair, including parts and labour, came to 515€. The engine is now running smoothly.
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RENAULT
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MOVANO
andreasschneider9
Hey there, those symptoms definitely point towards a rich running condition. A faulty injector is a prime suspect, especially with those kilometers on the clock. Have you checked for any other potential causes, like a faulty Mass Airflow (MAF) sensor or a vacuum leak? A bad MAF can definitely mess with your air-fuel ratio. Also, when was the last time you had your catalytic converter checked? A clogged one can also cause similar issues.