Renault Megane - Engines - Chugging Megane - Toxic Fume Filter - Renault Forums :: Independent Renault forum

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post #1 of 52 (permalink) Old 13th October 2005 Thread Starter
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Unhappy Renault Megane - Engines - Chugging Megane - Toxic Fume Filter

Just found these very useful forums the other day and registered, although I didn't think I'd need any help just yet, having just had my 53 Megane serviced a couple of weeks ago.

In last couple of days it has started to falter when accelerating in second and third gear, chugs away then eventually picks up.

Popping to Tesco's this evening and it started to do the same and one of the warning lights started flashing. Checking the manual, it says it's the "toxic fume filter" warning light!

Could this be something the dealer has done/or hasn't done at the service?

Thanks for any help

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post #2 of 52 (permalink) Old 13th October 2005
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What service did you have done? If is was the 18K then only the Oil and pollen filter would have been replaced.. So I guess that it would be coincedental..

If it was the 36K then this would also include the Spark plugs etc.. This would mean that the coils would have been disturbed.

Now the 1.6 (K4M) engine is fitted with 4 individual Coils . Made by a company called Sagem.. There was a bad batch of them made up until 330-3, (Day 330 of 2003).. This code is moulded on the body of each coil ..
There is a Renault solution that will allow these to be replaced under warranty..

Important: If the "Toxic Fume Light" is illuminated then I would recommend that you DO NOT drive the vehicle to far as this is an indication that the vehicle is misfiring due to a faulty coil or Spark plug.. If this is the case then Unburnt fuel will be leaking into the CAT convertor and it will Die very quickly..

Please take the car to a dealer, or better still get it recovered under Renault Assistance..

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post #3 of 52 (permalink) Old 15th October 2005 Thread Starter
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Thanks for the advice.

Took it into Renault Croydon friday morning, technician came out with me for quick drive and he believed it was probably one of the coils causing the misfire.

I left the car with them and they fixed it same day under warranty.

Picked it up today and its all fine now

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post #4 of 52 (permalink) Old 11th February 2006
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Misfiring Megane

I have a similar problem with the engine loght on and misfiring engine. How do I test the ignitions coils to find out which one is faulty? The coils are Sagem which appear to be an issue on a number of other posts.
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post #5 of 52 (permalink) Old 11th February 2006
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With the engine running you unplug the injectors one at a time.If when you disconnect one the engine speed drops/misfires worse then that coil is working.If the engine speed/note stays the same then that coil is faulty.
If funds allow then it is usually a good idea to change all four because if your having problems with one of them,then the rest usually go in sympathy a little time afterwards!.
I will reiterate what Webcode says that it really isn't a goood idea to drive your car with a misfire as the unburnt fuel will damage the catalytic converter.
Hope this helps.

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chugging , engines , filter , fume , megane , renault , toxic

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