[supercati]

Hello everyone,

I have a 07 330xd 231hp MT which is giving me trouble. Engine cranks, but won't start.

Last week I was driving on the highway at around 100km/h in 6th gear. I switched to 4th gear, tried to rev and it just made kind of "missfires", so I pulled over until I was almost stopped that the car stalled with clutch pressed.

After that, it was impossible to start the car, it just cranks, but won't ever start.

I changed injectors 3, 4, 5 because the car had 4-6s long cranks before. I thought that might be the solution... but that changed nothing.

I primed/bleed the fuel system. Nothing. I can hear the low pressure fuel pump (LPFP) working.

No fault codes on INPA.

Here's a video:
[u2b]

[/u2b]

I am also thinking... timing chain broken / snapped?

[Mik325tds]

Sounds like there's no compression on one of the cylinders. Timing chain is a good candidate. If you have INPA, can you see railpressure?

[Yozh]

No fault codes is strange. If your timing chain broke, you should crank much faster than normal. And usually there would be codes.

[Tambohamilton]

It's not a broken timing chain, but maybe it's skipped a tooth or 2. I think that would make sense, to have no codes too.

Nothing else I can think of makes sense for the symptoms; sudden failure, no codes, uneven cranking, no start but seems to still fire on maybe one cylinder (just).

I'd check the chains/timing ASAP.

[supercati]

Thanks for your replies!

There is an update: since I wasn't able to diagnose further myself, I took it to a workshop.
They testested the injectors, all were ok. They found no compression on cylinders 5 and 6.

That means engine broken... I can't explain the cause, and I don't know what's exactly broken... Sadly, I won't repair it, since it's not worth it anymore (too much to spend on a new engine).

[Tambohamilton]

Bummer. Sorry to hear that!