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renault clio coil warning light

Posted By b7evan 6/26/2005 10:12:55 AM
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b7evan
 Posted 6/26/2005 10:12:55 AM
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Hi, hope someone can help. We have a 2002 Renault Clio 16v 1.2

Problem: every now and again the coil indicator on dash lights up whilst driving on motorway; the engine decelerates and causes the car to slow down very fast. Driving at 70mph, engine speed drops to 40mph in seconds. The car is just this week out of its 3year warranty, we have had it back to the dealer twice and they said there are no faults!
Now driving from Glasgow to Liverpool this week, this fault happened 4 times on they way down & 3 times coming back up, the second time almost caused a serious accident as I was in the fast lane. The car needs to be switched off for 10 min then re-started and away it goes.
Any ideas what could be the problem?? and should Renault investigate this under the original warranty?

TONY_GINGELL
 Posted 6/26/2005 10:18:00 AM
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Coil warning lamp?
I take it you are refering to the engine management warning lamp. (Only Diesels have a symbol like a coil of wire.)
If the lamp has come on, then the computor does not like the information that it is getting from one of its sensors.
This then should trip a fault code that should be logged in the computor memory. Did the dealer say that there where none stored?
Regards tony


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DaveH
 Posted 6/26/2005 10:24:02 AM
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Is this a "fly by wire" vehicle, if so suspect a faulty throttle pedal assembly.

DaveH


  
 
 
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K And R
 Posted 6/26/2005 11:20:16 AM
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B7evan
What tony told you is true its a malfunction indication light (MIL), but you may have hit the nail on the head with coil. Your car almost certainly has H/t coils over the spark plugs, and these are always going wrong. If yours has not had new coils , I would think it needs them.
Have you any history of them being changed.
Kevin.


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rudi
 Posted 6/27/2005 1:24:45 AM
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Angus
I was thinking that if the ignition goes off for some reason while driving at speed, on the overrun the MIL light will come on together with charging light and that, I think, is not a fault that the ECU memory will log in. But I might be very wrong and I will appreciate if you or anybody could confirm that and enlarge my limited knowledge in car electronic.


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Angus
 Posted 6/27/2005 2:16:44 AM
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rudi

You raise an interesting point there.

I’d read the original post as a "limp-home" loss-of-power: but re-reading it, could also read as if it were cutting-out with a ten-minute restart time.

Perhaps b7evan could confirm the exact effect when this happens.  If it’s cutting-out then the TDC crank sensor comes into the frame.  I’ve heard of several cases of heat-related faults with them recently: even one that wouldn’t start if it was sunny!

And they don’t always leave a fault-code!


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b7evan
 Posted 6/27/2005 5:38:35 AM
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Ok, it happend again this morning so AA came out and took it to the Renault garrage, No fault codes recorded but the problem does seem to be throttle related, they mentioned there may also be a fault with the potentiometer mm (know what it is but not sure what that does for throttle) oh and warrenty is out by 5 days :-/

cheers for the help, will keep you posted
b7evan
 Posted 6/27/2005 5:44:17 AM
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I’d read the original post as a "limp-home" loss-of-power: but re-reading it, could also read as if it were cutting-out with a ten-minute restart time.

Perhaps b7evan could confirm the exact effect when this happens.

[color=Black][/color]No, the time wait to restart could bu anything from 2-10min Angus.
K And R
 Posted 6/27/2005 7:53:39 AM
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b7evan
Can i take it the dealer has serviced this ?. If so you have tape around a h/t lead, i think i would ask why ???.
also if the warranty is only out by 6 days , i would try to come to an agreement with them about getting it fixed they pay for the parts and you pay the labour, or vice/versa, if they want you to buy another Renault when the time comes.
Kevin.


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b7evan
 Posted 6/27/2005 12:09:13 PM
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Kevin,  no history of these coils ever being changed before, there is also insulation tape around one of the coil leads. How much do these things normally cost?
I will try my best to get renault to foot the bill but i don’t fancy my chances!!

cheers

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