Power Loss

[wanda]

Funny how the dealers always find the faults after warranty but when the warranty is valid there never seems to be anything wrong with the car. I just hope cars of tomorrow don`t come with expiry or use by dates

[AlexB]

I enjoyed reading your web page, thanks. These are a couple of references for completeness.

The following two links (as in my message in Links section) are the official documents describing the Engine Compartment Connection Unit, see chapter 87G in both.
https://meganedoksi.uw.hu/MEGANE_II/MR364MEGANE8.PDF
https://meganedoksi.uw.hu/MEGANE_II/MR366MEGANE8.PDF

The ECU is described here:
https://meganedoksi.uw.hu/MEGANE_II/MR364MEGANE1.PDF
https://meganedoksi.uw.hu/MEGANE_II/MR366MEGANE1.PDF

right. I now have, 1x new UPC, 1x new Fuel Injection Computer (ECU), the whole front loom checked and its STILL faulting, albeit not quite as regularly. its back in soon to have the turbo solenoid replaced as well.

I couldn't find any pics about removing the UPC so I made my own little guide in case anyone searches in the future: https://tallpaul.ucoz.co.uk/megane/

[tallpaul]

thanks alex.

the car is back in at Smiths in Peterborough, they're now talking fuel rails, fuel pumps and turbos!!

anyone got any info on the first two? are they dealer fit only? will i be looking at another 4-figure bill? am i better off trading it in somewhere?!!

[AlexB]

Tallpaul,

What codes did they read from the ECU? It is hard to suggest anything without it. It would be also good to hook a laptop to the OBD2 port, drive around for a while, display the diagrams and analyse the curves. This might give you a pretty good idea of where to look for the fault. There exists a procedure of checking pressure in the ramp and the volume of fuel returned from injectors. Have they done it?

Why are they talking about the fuel system and the turbocharger in the same time? What's the chance that two different systems develop two independent faults in the same time? Have they checked the play in the turbocharger shaft? Why the pump? -- have they found metal shavings in the fuel filter? I would be careful in letting anyone apart from whom I personally know in the fuel system. If dirt is introduced there, then you will be looking at replacement of injectors and many other parts, which is expensive.

To your question -- the replacement procedure is described in the repair manual, which one must read first. Injectors require programming, the fuel pump and the turbo -- unlikely, I am not sure.

[tallpaul]

right, turbo valve solonoid replaced, three weeks on and car seems fine, coughs now and again but nothing of concern, and no error messages. does it more when the car's down to its last 1/4 tank, but i just try and keep it full