Diesel Knock - Driving me insane! HELP!

[DXX]

maybe put a ink up of how yours sounds for a direct comparison?

I don’t do youtube or the rest of the social media

 

[darkman884]

I don’t do youtube or the rest of the social media

ohhh , go on
youve been building and maintaining diesel engines for 40 plus years ,how are you listening to that engine?

 

[darkman884]

it sounds like the cams are knocking their tits out , the fuelling sounds out ,there is sooooo much clatter , it sounds like a mechanical injection pump engine as opposed to direct injection.
i

 

[darkman884]

It sounds a bit gutless, like I said I can’t hear the turbochargers and it seems slow to react.
Doesn’t sound like my CFCA.

turbos are audible towards thhe end of the link, at least i heard them

 

[lockettben]

Are you sure you don’t have an exhaust leak at the manifold? I hear what sounds like noisy hydraulic valve followers and a possible exhaust leak. Oddly I can’t hear the turbochargers at all?

Oddly I had read that somewhere, i've been under and there is no physical signs of an exhaust leak around the manifold or the DPF connection.

 

[darkman884]

Oddly I had read that somewhere, i've been under and there is no physical signs of an exhaust leak around the manifold or the DPF connection.

i mentioned a noisy tappet yesterday, but thats not a noisy tappet

 

[Lubrown]

turbos are audible towards thhe end of the link, at least i heard them

Sure it wasn’t a well known swirl flap?

 

[darkman884]

Sure it wasn’t a well known swirl flap?

Ya legend

 

[manfrotto]

Does the injector timing look ok using live data from VCDS?

 

[alexlex85]

So is it throwing any errors?

 

[lockettben]

So is it throwing any errors?

No errors at all. Just noisey, and is getting worse!

 

[lockettben]

Does the injector timing look ok using live data from VCDS?

Sorry mate didn't see this comment! Any idea what I'm looking for on VCDS for this?

 

[manfrotto]

Sorry mate didn't see this comment! Any idea what I'm looking for on VCDS for this?

@mmi is the expert in blockmaps but maybe :

IDE12085	Fuel injection time deviation: cylinder 1	ｵs
IDE12086	Fuel injection time deviation: cylinder 2	ｵs
IDE12087	Fuel injection time deviation: cylinder 3	ｵs
IDE12088	Fuel injection time deviation: cylinder 4	ｵs

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32​

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-13​

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-37​

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17​

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These were values from my van at idle, but you would need to gragh it while you rev the engine an get the knocking.
Probably also worth graphing fuel rail pressure engine revs etc at the same time

 

[alexlex85]

Injectors need coding. If this is not done they engine will not run right and be louder. I had this on my 5 series after replacing the engine. as soon as i coded the injectors it was quiet as a mouse.

I have replaced the CFCA in my california and coded the injectors straight away