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I will be getting the dpf fully cleaned whilst they are rebuilding the engine

Yes it started making perfect sense once I found out that the compression in cylinder 2 was slightly low. It wasn’t excessively low hence why it still started and drove pretty well considering the issue. As for the nox sensor issue once i had them replaced both sensors were showing up as having...

I have now dropped the car off at a local engine specialist who will be taking apart the engine and rebuilding it as necessary. He suspects it is the rod and that its bent by mm’s as hes had a few thats come in before and they presented the exact same problem. Going to have to bite the bullet on...

Hi everyone, just wanted to give you all an update in regards to my problems. I finally managed to get a compression test done and it turns out the compression in cylinder 2 is indeed low. Not sure what these numbers mean but if you guys can help it would be much appreciated. The figures i got...

Hi all, thanks for your replies. I think the main thing im trying to say is ive had a look at cars with slightly bent rods and how they sound and what the tell tell signs are and it just doesn’t seem to match mine. I know some of you have suggested that not all of the time u will get these signs...

Yeah that doesn’t happen with mine though this is why its a strange problem. The car starts first time from cold absolutely fine with no issues or misfires at all. Runs and drives fine. After a few minutes of warming up it starts misfiring and only when it misfires it starts blowing white smoke...

Yes both nox sensors have been replaced but i heard somewhere that apparently they need a software update in order for them to start working? I thought they were plug and play? And also those other systems you mentioned surely it would throw up a code if anything goes wrong with them ? The only...

Hi, yes i know it’s ridiculous i have been looking everywhere even today i have spent the best part of the morning calling all local garages and not one of them have so far been able to help. All of them either dont do compression tests at all or if they do its only for petrol engines. Imagine...

This comment really helped. I just remembered a very important fact. When the car was put on the diagnostics there was indeed a code for the dpf being full of soot but the guy said this is probably due to the nox sensor being faulty and therefore it affects things like the dpf not allowing it to...

Yeah to be honest i just saw the exact car I wanted on auction had all the right spec and was marked as flood damaged but I thought i will take on a challenge. I bought the car thinking it will need a whole new replacement engine and with that in mind i bidded on it. I didnt take into...

Hey yes please would be great if you can get me the part number i didnt even think about that, apparently removing the glow plugs is a hard job as they tend to get stuck in there sometimes due to the high heat they go through.

This is exactly what i was thinking too but so many people have told me this could be a bent rod and apparently as the car is heating up it is expanding within the engine therefore the misfire goes away but i guess there’s only one way of finding out for sure

I have been told this by many other people too it is a likely culprit i had the compression test done on star xentry and it just showed the number 6 on all 4 cylinders and was green assuming this means all good but apparently only way of checking is by doing the physical compression test.

Hi thanks for the reply, yeah i have checked all the obvious areas for corrosion or water damage but i cant seem to find any. Annoying thing is when the car was put on auction they clearly gave it a little clean up and wash so you can’t really tell how far up the water came. Usually this gives...

Thanks again for your reply. Yes this does make sense i guess the very next step i should take is get a physical compression test done on all 4 cylinders through the glow plug holes, does it matter whether this test is carried out whilst engine is hot or should it be completely cold and left...

Thanks for your reply, the problem here is i have had a compression test done on both cold and hot engine temperature and it is completely fine on all 4 cylinders this is one of the first things i had checked before i started spending more money on it. Thing is with diesel even if the slightest...

Im just confused as to what ive missed? Surely if it was an electrical fault it would always be present or atleast intermittent but this problem only occurs when engine is cold left overnight next morning on start up it doesn’t misfire straight away but gradually as its building temperature it...

The injector was replaced by a Mercedes specialist and he used the star xentry tool to code the injector in

Had that done already on the Mercedes star diagnostics all 4 cylinders were fine no issues with compression

I have a w205 2015 c250d bluetec that I bought flood damaged. It has a very strange problem when starting from completely cold the car starts first time with no problem or issues starting and runs for the first few minutes just fine but then as its coming up to around 40-50 degrees it starts...