Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed* - Page 11 - Renault Forums :: Independent Renault forum

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post #51 of 121 (permalink) Old 21st April 2010
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Re: Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed

Hi, I've had the warinig light with the ZIg Zag line horizontally going through it, which i guess is the coil warning light, come on recently, causing a loss of power when decelerating and the engine to idle about 500rpm faster than normal.

does anyone have any idea if the coil is causing this?

thanks

sam
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post #52 of 121 (permalink) Old 2nd May 2010
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Re: Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed

Replacement is easy, After unclipping the wire, unscrew the smal retaining screw but do not be heavy handed - it has been known to shear.
Not the end of the world though!

Probably a coil .
Try the second from the left first. If no improvement , target the third (front of car) - these usually go first.

Once this sorts out the running of the car - Change the lot! One invariably finds - another coil going down shortly afterwards.
Too often to save cash, just one is replaced - then trouble returns, at a very inopportune time - up a bloody mountain or on a dark, wet night. Yes! the vehicle will often limp along, but then damage can occur to your cat converter - at which stage you are talkng about big money.

This writer went onto the Internet for his coils , though I'm aware local alternative car shops sell them. A set of four is around 60 - Renault coils were 43 each. Not sure about the fitting charge or associated coupling to a diagnostic computer - locally the latter is 45 to plug in.

Incidentally one Internet supplier offers a three year warranty plus next day delivery before noon!
Naturally there are other areas that could be at fault -but if you do not have a diagnostic gadget -that's the first place to examine. Only tools required a socket spanner. SamWoerth
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post #53 of 121 (permalink) Old 2nd May 2010
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Re: Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed

Just for info and further to the above. I have just changed the coils in our Scenic. Second from left was the worst

109 for all four from my local motor factors which is a whole lot cheaper than Renault parts. Don't worry about the make of the coil as I've been informed it's a running problem which is not specific to the particular coil you put in.........that's what I've been told anyway!!

Ten minute job at most on our Scenic.
  • remove engine cover
  • unclip the four ignition leads
  • undo bolts holding coils in place
  • wiggle coils free of spark plugs
  • replace in reverse with new coils
I would say you may as well check the condition of your spark plugs whilst removing the coils .....to birds with one stone an' all that

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post #54 of 121 (permalink) Old 2nd May 2010
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Re: Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed

Wife has just come home saying her Scenic has a warning light on the dash and is running rough. Been out and started it up, no warning light now but it is chugging on idle and when revved a bit it is definitely misfiring.

Is that likely to be the coils ?

Bloody car, only just replaced rear shocks on friday......its a conspiracy i tell you.
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post #55 of 121 (permalink) Old 2nd May 2010
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Re: Renault Scenic - Faulty Coils Causing Warning Light(Including General Info)*fixed

It sounds very promising to be a downed coil , you can't afford to run it too much either, if it is a coil & you don't sort it PDQ it will ruin the CAT
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