renault 1.9 dci missfire

renault 1.9 dci missfire

Author
Discussion

Road Hog

Original Poster:

2,577 posts

220 months

Tuesday 28th August 2007
quotequote all
my megane sport tourer has an intermitant missfire sometimes going for days with no probs and other times every few miles ,tried changing where i fill with fuel ,made no differance.

any ideas


CheekyMonkeyla

4 posts

206 months

Monday 3rd September 2007
quotequote all
Im not sure if they have an ignition coil but i had some misfiring in my 5 series a few months back, could be that...

or also check the spark plugs too..

Mikey G

4,784 posts

247 months

Monday 3rd September 2007
quotequote all
DCi is a diesel, so no ignition system to missfire.

I would say its either a blocked fuel filter or a dodgy injector.

Road Hog

Original Poster:

2,577 posts

220 months

Monday 3rd September 2007
quotequote all
had it on computer not showing any fault codes.

??airflow meter ?

Mikey G

4,784 posts

247 months

Monday 3rd September 2007
quotequote all
Road Hog said:
had it on computer not showing any fault codes.

??airflow meter ?
Possibly, is it a full misfire as in it sounds like it drops a cylinder or does it just give a little hiccup and carry on as normal?

Road Hog

Original Poster:

2,577 posts

220 months

Monday 3rd September 2007
quotequote all
usually on light throttle it just seems to miss then pickup, sudden fuel starvation or as if it has water in fuel.

loose cannon

6,040 posts

248 months

Monday 3rd September 2007
quotequote all
sounds like a injector issue if there are no faults you probably need to carry out a leak off check on each injector that would be my next step

orange n blue

115 posts

221 months

Tuesday 4th September 2007
quotequote all
Just had the same problem on a Laguna dci. the engine has a slight hesitation at between 1600 - 2000 rpm.
There is a lot of information regarding this problem on the Renault owners forum and also Parkers forum.
They suggested first to clean the EGR valve. Sticky carbon deposits build up in the valve and prevent it from closing properly.
another thing to check is for leaks on the intercooler or pipework. Ours was a broken housing on the damper valve where the intercooler connects to the inlet manifold.
Last thing, unplug the MAFF sensor and see if the problem disappears. If it does the sensor needs cleaning.
Hope this helps.

Road Hog

Original Poster:

2,577 posts

220 months

Tuesday 4th September 2007
quotequote all
just one thing what is an MAFF ?

orange n blue

115 posts

221 months

Wednesday 5th September 2007
quotequote all
MAFF mass airflow meter

Road Hog

Original Poster:

2,577 posts

220 months

Monday 10th September 2007
quotequote all
not missfired since replacing airfilter with a K+N one.
(holding large piece od wood) car goes so much better with new filter .

also found damp round the connector for airflow meter wd40 same.