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#607204 - 24th Oct 2011 10:28am misfire on renault megane
tweetypie_5x Offline
Member

Registered: 11th Jun 2011
Posts: 59
Loc: rock ferry
Bought a 52plate megane mark II nealry 4weeks ago, for 3weeks its been in the garage with a misfire. The car only misfires on tick over and sometimes struggles to start, will loose power every once in a while when driving but as soon as you switch it off and start it again this seems to go. The electrics seem to be faulty as the steering will only lock occasionally as well and have a service light that comes on and off and just recently started givong a message of check injectors with an engine management light. The garage cant seem to find any fault though from what i can see they haven't actually replaced anything, apart from what i've paid for myself.

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#607210 - 24th Oct 2011 10:34am Re: misfire on renault megane [Re: tweetypie_5x]
StuyMac Offline

Wiki Master

Registered: 24th Nov 2003
Posts: 12002
Loc: Wirralshire
Has the car been code read?

Saw a similar issue on another Megane recently - turned out to be the variable timing controller on the inlet cam.

It could however be one of a few things and will need to be code read before you start changing parts as it could be one of so many things.....
_________________________


What If There Were No Hypothetical Questions?

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#607301 - 24th Oct 2011 12:27pm Re: misfire on renault megane [Re: tweetypie_5x]
tweetypie_5x Offline
Member

Registered: 11th Jun 2011
Posts: 59
Loc: rock ferry
It has but it just comes up with a list of possible things that could be wrong, p0303 was the 1st code it came up with which was a misfire on number 3cylinder then it said multiple misfires now check injectors. The ignition coils have all been replaced along with the spark plugs but this changed nothing.

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#607318 - 24th Oct 2011 12:42pm Re: misfire on renault megane [Re: tweetypie_5x]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10808
Loc: Birkenhead
Very similar fault codes that I got with valve timing wrong (on a completely different car) so Stuy may be spot on.

Does it rattle on start-up?
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#607334 - 24th Oct 2011 12:52pm Re: misfire on renault megane [Re: tweetypie_5x]
Maisie Offline
Old Hand

Registered: 15th Aug 2009
Posts: 323
Loc: Birkenhead
Hi, I had a similar problem with my Renault Clio, coming up with all sorts of codes. One code that kept coming up time and time again was the MAP sensor. which was changed 3 times until myself and Diggin Deeper (who I will be eternally grateful too) took the throttle body off and cleaned the idle sensor. And hey presto the car has been running trouble free for months now!!
There seems to be a problem with the sensors on the renaults, that are totally misleading. The code could tell you it's one particular sensor, when it's actually not that sensor at all. As with my case!! All I'd suggest is go through all the sensors one by one, unplugging and plugging in again, could just be a loose connection.

http://www.renaultforums.co.uk/

This was a really big help to me, when I was having problems. There are a lot of "renault" knowledgable people on there.

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#607419 - 24th Oct 2011 1:45pm Re: misfire on renault megane [Re: tweetypie_5x]
markmagoo Offline
Newbeee

Registered: 10th Aug 2011
Posts: 27
Loc: Wirral
i have a the same problem with management light being on full time took it the garage and they said nothing came come up the check so much to say its being driven around for the past two years with no problems what so ever and passed two mot's

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#607425 - 24th Oct 2011 1:50pm Re: misfire on renault megane [Re: tweetypie_5x]
Clive Offline
Forum Master

Registered: 3rd Jul 2011
Posts: 2620
Loc: some where else
Originally Posted By: tweetypie_5x
Bought a 52plate megane mark II nealry 4weeks ago, for 3weeks its been in the garage with a misfire. The car only misfires on tick over and sometimes struggles to start, will loose power every once in a while when driving but as soon as you switch it off and start it again this seems to go. The electrics seem to be faulty as the steering will only lock occasionally as well and have a service light that comes on and off and just recently started givong a message of check injectors with an engine management light. The garage cant seem to find any fault though from what i can see they haven't actually replaced anything, apart from what i've paid for myself.
Take throttle housing of, give it a good spray with carb cleaner, including in all holes in it, and check your ht leads., also if you have replaced parts on it, disconnect battery for 2 hours so clears ecu, and so it can relearn that faulty parts are no longer faulty. And it will relearn your driving style again.
_________________________
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#607429 - 24th Oct 2011 1:51pm Re: misfire on renault megane [Re: markmagoo]
Clive Offline
Forum Master

Registered: 3rd Jul 2011
Posts: 2620
Loc: some where else
Originally Posted By: markmagoo
i have a the same problem with management light being on full time took it the garage and they said nothing came come up the check so much to say its being driven around for the past two years with no problems what so ever and passed two mot's
it wont pass new mot test coming in in Jan, if engine E.M.L is on it will fail mot same as airbag light.
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