The Mégane II Owners' Club

Update - After carefully checking every wire from ecu to engine and fusebox and finding all ok. I decided to go to the breakers and got some coils.

And the cause of my problems is 2 more coils are faulty!

So 4 out of 4 coils turned faulty! EBay seller is refusing to refund me!

Hi again, this is what l have found P0323 crankshaft position sensor circuit intermittent this had you fooled P0352 ignition coil cylinder 2 P0353 '' '' '' 3 l reckon the other two codes are caused by the misfire. l also think the coils could be missing because of the crank sensor, but you should b...

Update - now have codes P0300 - ramdom/multiple cylinder misfire P0638 - throttle actuator control range performance P0353 - ignition coil c primary /secondary circuit P0352 - " " b " " P0323 - misfire due to low fuel level. Where do the hell do I start! Anyone know where I can g...

hello there.....re fuel and fuel pressure...the fuel pressure should be around 43-48 psi at the fuel pressure monitoring nozzle on the fuel distribution unit ( normally its a fuel rail with the injectors connected to it)...this can be measured with a bit of clear piping and a suitable pressure gaug...

Hi, What I can't work out is the ECU coming up with 'misfire due to low fuel level' the only way it can see the fuel level is by the fuel tank level sensor which is showing half full on dash. And I know there is no fuel pressure sensor on the fuel rail so does the ECU maybe mean misfire due to low f...

Update- my new misfire is again on/off, I can drive for 10 minutes (hot or cold engine) and it's running fine and just like you throw a switch the misfire starts. Just checked codes and now have 'misfire cylinder 2' and also 'misfire due to low fuel level' but fuel tank is about half full! Also I ha...

Just don't believe this- it's back to misfiring, flashing engine light, flashing service light and 'check injection'!

Well done, just shows how diagnostics can mislead, would have cost a fortune in a garage because they encounter the same problems. Process of elimination can bring you right back to where you started. Bob. Cheers, just my luck that I swapped a faulty coil with a faulty coil. Still got it sorted in ...

Sorted - turned out to be 2 faulty coils (all 4 were only 6 weeks old)! I swapped the coil from cylinder 3 to no 4 and still had the 'misfire cylinder 3' all because no 4 was also faulty! Do not know why ecu didn't pick up a misfire in cylinder 4! And why I had 'check injector' on the dash. Replaced...

Update- Just done a compression test with a hot engine and every cylinder is 11/12 bar. So all fine inside engine! The misfire is at its worse with a hot engine. Have noticed about 20% of the time it's fine no misfire then it's like someone throwing a switch the misfire starts. Then it's at its wors...

Hi again, a thought went through my head and l have to run it by you. When you check injector 3, are you sure you have them numbered correctly. l coded injectors on a clio not long ago and found that renault number them 1234 from the flywheel end. l don't know about petrols but it was just a though...

Hi, yes I will give it a try. Thanks

But surely it can't be the head gasket because if I clear the fault codes and then start the engine, the engine light flashing and 'misfire cylinder 3' comes back straight away which makes me think it must a electrical fault for the ecu to see it immediately.

Update- swapped petrol injector from cylinder 3 to 4 and checked the injector loom (the bit from plug which clips into the lifting eye to each and very injection ) and stIill have ' misfire cylinder 3' ! So far all new coils, swapped coil, spark plug and fuel injecter from cylinder 3 to 4, checked l...

Hi all, My Megane 2004 1.6 16v had a full engine service about 6 mths ago (all filters, plugs, oil etc..)and has been running fine up to 6 weeks ago then it started misfiring. After a few days the engine light came on with cylinder 3 misfire. so as the plugs had been changed and the coils all looked...

So does the fuse box need coding to the car or will a 2nd hand one just 'plug and play'?

Thanks,