The codes are not Renault specific and are generic so they may be totally erroneous.

Renault use a different protocol in their ECU's so not all code readers are compatible.

Can you describe the misfire? Does it occur during idel or only at certain engine speeds.
Are there any warning lights on the dash?

 

Thanks for prompt reply.

It starts and idles fine, as well as I'm aware. It is usually on harder acceleration. It seems to pull away OK, on realatively hard acceleration it either feels to miss a little or dies - really lacks power, but comes back immediately. One or two red lights come on but so briefly I haven't caught what they are.

On the Foxwell, is this not really worth purchase?

Malc

 

When it comes to Renaults there are very few code readers which are truly Renault compatible so unless the kit can be proven to be compatible it may be a waste of money. If it is cheap enough and you are likely to work on non-Renault models then it may be worth considering.

It is possible the EGR valve is sticking - one common symptom being hesitation around the 1500 - 2500 rpm range - very common problem on the Dci engines.

 

Usual diesel problem. Spent hundreds of pounds a few years ago on a Fiat Marea with garage diags, even replacing the ECU. Eventually resolved it myself for £15 - EGR Modulator Valve.

I had orginally thought to give EGR a clean.

I was under the impression that from early 90s legislation standardised ECU diags. I'll take it back explaining view on Renault diags.

It's been raining all day today, will let you know after a clean of EGR.

Thanks

 

Same symptoms, same codes in my Trafic.


It was an injector. Replaced all 4.


Dave

 

Thanks Dave. Did you do any testing for resistance on the old injectors to prove things to yourself? Suppose if it worked you wern't bothered.

Is 50k miles an expected time for injector failure. Previous technology for injectors in Peugeot 405 > 176K miles and Xantia > 150k miles without issue.

Is this an actual breakdown of the injector or would some 'Forte' diesel treatment cleaning qualities be a benefit?

 

My misfire around 2750-3000 revs only on hard acceleration. Called in AA on M6 and got recovered to Renault dealership.

Renault paid 35% of bill as Trafic 08 and 65k.

Runs a dream again now.

Dave

 

Hi,
just back from a visit to local Renault main agent confirming injector 2 being faulty. So Foxwell - P0202 was correct.

As recommended - decided to have all four replaced. I was shown the corrossion mainly around 2 and told of possible problem getting injectors out. He put a penetrating oil on and said to leave it for a week or two.

Not a welcome expense, but hopefully that'll be it for a while.

 

After Renualt got a bit of one injector stuck, got them to call Tony _ http://www.apautodiagnostics.com/injector-removal-service who I was originally wanting to do job.
Tony removed the injector end - vehicle now back together and running great again.
Have a look at his web page - I would certainly recommend him to anyone with an injection issue.
Thanks to all for help.
Malc

 

Another one? Renault really ought to take responsibility for all the M9R injector failures in Trafics It's clearly a common enough fault not to be coincidence...

My Dad said they'd changed something on his when it went in for a service with a view to preventing engine compartment water ingress. I'm assuming that they're trying to fix the cause on the sly without recompense to those who've already suffered injector failures, not to mention their propensity to jam in the head...

 

Yes the tray under the bonnet has been sealed after they did the injectors. I was told by Harretts that they were told to do this when Trafics were in for service. Wether or not this makes a significant difference to the galvanic corrossion of dis-similar metals or not. But with research and development of someone like Renault, I find it difficult to believe that they assemble engines with aluminium alloy, steel and copper with these injectors. It's some thirty years ago I first experienced a steel bolt bolt in an aluminium casting of a Thule roof bar, not to mention steel brake pad pins in alloy caliper castings.

 

Hmm, the injectors being stuck in is probably a result of corrossion of dis-similar metals, but the fact the injectors stop working in the first place is almost entirely Trafic specific and does seem to be caused by water ingress - there are loads of other vehicles with the M9R engine, yet we don't see the forums full of threads about those having injectors fail or finding puddles around the injectors. In fact, by and large the M9R seems to be the most reliable engine Renault (Nissan) have made recently.