megane 1.5 dci lack of power and white smoke

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Cemap24
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Joined: Sat Feb 06, 2010 6:58 pm
Currently Drives:: megane III 1.5 dci hatchback 2009

megane 1.5 dci lack of power and white smoke

Postby Cemap24 » Sat Feb 25, 2012 3:17 am

Hi need a bit of help if possible. I have a megane 1.5 dci 2003 and have been having the following problem.
Recently i had the diesel filter blocked which cause the car to stop with injection fault but this has been repaired.
My problem is the megane has developed a lack of power it starts fine and has no missing but from time to time just has a lack of power when this happens it also produces white smoke out of the exhaust.it is not burning oil. Does anyone know what the problem may be is it the erg Valve as i have heard that this may need cleaning every 60K and my car has done 128K without cleaning the valve.it only happens mainly once the car has started up. once it is warm it is ok.

Rapidshed
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Currently Drives:: 2003 megane dci 120

Re: megane 1.5 dci lack of power and white smoke

Postby Rapidshed » Sat Feb 25, 2012 10:21 am

what age is your car?

white smoke is unburnt fuel / vapour

if your car is fitted with a dpf particulate filter, its more than likely that mate, it needs employes fluid to clkean it, but if your on the same one at 128 you've done bloody well, the fluid tank holds like 5 litres, and it costs a bomb per litre like 20 quid, it dripps into the filter to clean it as its used, 5ltr is only good for 60 ish thousand i think.

so may be that the filter is blocked/partial block, the lambda is sensing the wrong reatio and cars overfuelling ,

you can do a diy take it off and clean it with mr muscle, but there gauzes at either end so difficult to wash it through, or take it to a grage for deep clean or buy new one, and top up fluid but it all add's up i'm afraid.

or its your injectors, ones dripping at the tip and overfuelling and its not being burnt off, and not allowing the cyclinder cycle to add the combustion power.


all just guesses from past experieince mate, i think egr being blocked is black smoke.

tres103
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Joined: Wed Sep 01, 2010 6:30 pm
Currently Drives:: megane sport 175dci

Re: megane 1.5 dci lack of power and white smoke

Postby tres103 » Sun Feb 26, 2012 5:11 pm

Could be injector fault giving white smoke.also the dpf clean is done by heating the element in the filter.what above sounds like he describing whats known as ad-blue.

Rapidshed
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Posts: 168
Joined: Sun Nov 06, 2011 3:22 pm
Currently Drives:: 2003 megane dci 120

Re: megane 1.5 dci lack of power and white smoke

Postby Rapidshed » Sun Feb 26, 2012 5:30 pm

dpf is not done simpley but heating it up, there the employes fluid driping in and the regeneration cycle, everytime you take the fuel cap off the system drips, if you drive at about 3k for 10 mins it forces a clean

tres103
Passed Theory
Posts: 34
Joined: Wed Sep 01, 2010 6:30 pm
Currently Drives:: megane sport 175dci

Re: megane 1.5 dci lack of power and white smoke

Postby tres103 » Sun Feb 26, 2012 6:12 pm

My car has a dpf has no pipes or fluid.only thing to be put in the exhaust is ad blue.

tres103
Passed Theory
Posts: 34
Joined: Wed Sep 01, 2010 6:30 pm
Currently Drives:: megane sport 175dci

Re: megane 1.5 dci lack of power and white smoke

Postby tres103 » Sun Feb 26, 2012 6:17 pm


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pw981
Rally Driver
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Joined: Thu Mar 24, 2005 11:55 am
Currently Drives:: 04 Megane 1.9dCi replaced with a 07 Toyota Auris 2.2 D-CAT 180
Location: County Durham

Re: megane 1.5 dci lack of power and white smoke

Postby pw981 » Sun Feb 26, 2012 6:32 pm

Renaults FAPs don't use that fluid what Peugeot Citroen use, the system is different.

As your 1.5dCi is 2003, if you're in the UK then your car won't have a FAP (french for DPF).
2004 Megane II 1.9dCi

tres103
Passed Theory
Posts: 34
Joined: Wed Sep 01, 2010 6:30 pm
Currently Drives:: megane sport 175dci

Re: megane 1.5 dci lack of power and white smoke

Postby tres103 » Sun Feb 26, 2012 6:40 pm

Lol least someone knows.one of the guys in work got a 1.6 scienic with ad blue.its a uk car on a 20@@ plate.sounds like the lad above was describing adblue.

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pw981
Rally Driver
Posts: 1046
Joined: Thu Mar 24, 2005 11:55 am
Currently Drives:: 04 Megane 1.9dCi replaced with a 07 Toyota Auris 2.2 D-CAT 180
Location: County Durham

Re: megane 1.5 dci lack of power and white smoke

Postby pw981 » Sun Feb 26, 2012 7:12 pm

What is ad blue?

Renault FAP don't use any fluids at all, unless the newest 1.6dCi engine does, I'm not sure.
2004 Megane II 1.9dCi

tres103
Passed Theory
Posts: 34
Joined: Wed Sep 01, 2010 6:30 pm
Currently Drives:: megane sport 175dci

Re: megane 1.5 dci lack of power and white smoke

Postby tres103 » Mon Feb 27, 2012 7:05 pm

well ad blue came from the hgv industry.(im a bus mechanic)now used on buses.renault use it,also mercedes vw (bluemotion i think)urm its basically cow urine which is injected into the exhaust system.for more indepth explaination have a look at this link https://alternativefuels.about.com/od/re ... adblue.htm


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