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[B52]

KW02 is unwell again - starts and runs but it has a misfire and now a steady orange EML.

Months (and barely any miles) after new cam sensor, service, MoT and cambelt this isn't ideal.

I'll try a pedal test, but research on here makes me think coil pack? Cam gaskets were replaced around 2010 but at 51k miles now, lack of use probably won't have helped.

Or am I missing something basic?

[deviator]

Coil pack, plugs, oil in plug holes.

[B52]

Those were my first ideas too - coil packs have never been changed.

It doesn't help I've knackered my back doing stupid DIY.

[Doctor Gollum]

Pedal trick and report back 

Probably cat codes if it hasn't been driven properly 

[Enceladus]

The good news is that reading the fault codes on a 2.6/3/.2 V6 will tell you which bank has failed. Cylinders 1,3,5 are offside and 2,4,6 are on the nearside.

Also good news is that each bank on the 2.6/3.2 V6 has it's own dedicated electronic ignition unit and they will be a lot easier on your bad back to change than the single coil pack on the 2.5/3.0 V6 which incidentally doesn't throw any specific fault codes.

Look for oil and/or water in the spark plug wells. If found then fix the cam cover seals and/or scuttle leak first. Before you condemn the ignition units.

[B52]

Pedal test -

P1612 Immobiliser No Or Wrong Signal Immobiliser (I used the spare key today)

Then it cycles between

P0300 Random/multiple cylinder misfire detected
P0302 Cylinder 2 Misfire Detected

[Nick W]

Pedal test -

P1612 Immobiliser No Or Wrong Signal Immobiliser (I used the spare key today)

Then it cycles between

P0300 Random/multiple cylinder misfire detected
P0302 Cylinder 2 Misfire Detected

That means you start with the spark plug for #2 cylinder(but check 4&6 as well) and then inspect the coil pack.


You're looking for damage that could have been caused by oil or water sitting in the plug wells. Water will be a leaking scuttle, so fix that, and oil is down to failed cam-cover gaskets.


Those are the most likely causes of a misfire, but do be aware that it could be wiring to the coil pack/fuel injector or the injector itself.


I would suggest it's not worth doing just one side.

[B52]

Thanks - I'll take a look. Probably tomorrow, as apparently 'we' should be making dinner.

[B52]

Have I got the layout right -

Windscreen end
5 - 6
3 - 4
1 - 2
Radiator end

Fault is at cylinder 2, therefore 2-4-6 coil pack (9118115)?

[Doctor Gollum]

That's it

Don’t just presume that it's the coil pack though. 

[B52]

Goodo

New spark-plugs fitted last October so I suppose it's possible something not put back right, although garage is generally reliable.

[Doctor Gollum]

Plug 6 is generally the one that gets missed

A toasted bannock says that the sponge on the firewall is completely soaked and dripping onto the coil pack plug...

[New POD]

Plug 6 is generally the one that gets missed

A toasted bannock says that the sponge on the firewall is completely soaked and dripping onto the coil pack plug...

My 3.2 had a misfire this evening. It's been pissingbrain for days. . No engine management light, but when I put the code reader misfire on cylinder 6.
It was okay later, after 5 miles of running, but i reckon it's water on the coil pack or the plug hole full of oily mayo.
When it stops raining I shall investigate.

[Nick W]

Have I got the layout right -

Windscreen end
5 - 6
3 - 4
1 - 2
Radiator end

Fault is at cylinder 2, therefore 2-4-6 coil pack (9118115)?

Most engines are numbered from the crank pulley end. Renault have a nasty habit of randomly numbering some of theirs from the flywheel. There's a simple way to avoid this being a problem: don't work(or own) Renaults!

[Doctor Gollum]

Fault
Randomly
Experienced
Not
Currently
Happening

[New POD]

Plug 6 is generally the one that gets missed

A toasted bannock says that the sponge on the firewall is completely soaked and dripping onto the coil pack plug...

My 3.2 had a misfire this evening. It's been pissingbrain for days. . No engine management light, but when I put the code reader misfire on cylinder 6.
It was okay later, after 5 miles of running, but i reckon it's water on the coil pack or the plug hole full of oily mayo.
When it stops raining I shall investigate.

It stopped raining.  The more often I take the plugs put the easier it gets each time. I've had the car for 60k and I've had the coil packs off at least 8 times.
The cam cover gasket was done by me, about 50k ago.

The fault appears to be either:

have been the spring that sits at the end of the coil pack and wraps around the spark plug had come off the coil pack.

Damp.

A small amount of FOD in the plug well.  (The remains of an oily rubber glove Which was probably me)

I swapped the spring for the one on plug 2, and swapped spark plugs 4 and 6. Thus if I get a misfire from 2, it's the spring, and 4 it's the plug.

Cleaned the plug well with erm cleaner and a cloth.

Put it all back together, deleted the fault code and went for a drive..

Seems fixed.

[B52]

Thanks - I've acquired a 2-4-6 coil pack just in case but I'm mindful it might be something similar (not least because the plugs have been replaced recently and it's No 2 cylinder when No 6 would be the prime suspect).

Find out next week.

[B52]

Solved: faulty coil pack replaced