Uneven idle and car stalls when slowing down or stop. What is the problem?

Tiny
KEITH RASS
  • MEMBER
  • 2000 RENAULT SCENIC
  • 240,000 MILES
I have just serviced the renault but it has an uneven idle. It also stalls whenever I stop or slow down or take foot of the petrol
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Monday, April 16th, 2012 AT 8:48 AM

1 Reply

Tiny
KASEKENNY
  • EXPERT
There are a couple things that will cause this but since you just performed a service, we need to start with two things. First the fuel pressure and second is the oil level.

Here is a guide that will help with this issue in general:

https://www.2carpros.com/articles/stall-at-idle

Here are a couple guides that will help with fuel pressure as well:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Lastly if these check out ok then we need to check for the engine for a vacuum leak. This will also be causing the issue you are seeing so here is a guide that will help with this as well:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run through this info and let us know what questions you have. Thanks
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Thursday, November 4th, 2021 AT 6:47 PM

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