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Discussion Starter #1 (Edited)
Hi,
I have a Scenic 1.6 auto on a w plate that seems to struggle when she idles.

Starts first time, and idles as it should for a few seconds, then the idles drop approx 100rpm then jumps back up. It does this consistently so it feels like it's misfiring. It will occasionally rev itself to approx 1000 rmp then drops again.

We've just fitted new plugs & air filter. We've unplugged each coil in turn & all seem to be working ok, so we have no idea why she's idling so weirdly.

I have also just done a seperate post about not having any EML coming on at all (not even when dash light illuminate on start-up). Could everything be linked?

Thanks
 

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13,667 Posts
Sounds like MAP pipe is cracked. Look for a 10mm dia pipe running from RHS of engine high up, to a plaggy thing with wires on the bulkhead. Pipe is black & S shaped. They usually crack at the back.
HTH
 
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