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Megane II cold start problem

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Old 16th April 2009   #1
petta
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Megane II cold start problem

Hello!

I have a Renault Megane II 2005 1,6 16v. My problem appeared a couple of weeks ago when the car didn´t start on the first try as i used to. when I press the startbutton now it takes up 3-4 tries before it starts. The start engine works, it fires, but won´t turn over. The start problem is only when the engine is cold. If I were to drive the car for a while, stop and turn it of/on again it would start on the first try after pressing the start button. The cold start problem also appears when I´m driving. when the engine is cold, the idle is moving up and down, just a little bit, and when I throttle, the engine "jumps" a little bit. The problem disapears as soon as the engine gets warm and then it works perfectly.

Do you have any clue what the problem might be?

best regards,

Petter
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Megane II cold start problem Engines j1mmy1985 3 2774 16th April 2009 02:55 PM

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Old 17th March 2011   #2
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Re: Megane II cold start problem

hello petta did you get to the bottom of your problem as I am having very similar issues.
thanks James

P.S. heater plugs are ok and I have cleaned the TDC sensor
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Old 17th March 2011   #3
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Re: Megane II cold start problem

Hi Jimmy - welcome to the forum.

As you mention your engine has heater plugs I take the engine is a diesel. The post by Petta refers to a petrol engine.

But if you are having starting difficulties from cold but all is OK when the engine is warm it may be worth checking the engine coolant temp sensor/s. If faulty the ECU will think the engine is always warm and therefore not adjust fuel and injection timing to suit cold starting.
No gaurantee that is you problem but it may be worth checking if only to rule it out as a possibility.
Currently in madnoel10's garage:
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Old 19th March 2011   #4
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Re: Megane II cold start problem

Hi madnoel10
TBH i have read that many forums that i didn't realize this was about a petrol lol
have you any idea where the coolant temp sensor is located on a 1.5 dci
thanks James
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