2.4D (2005 on) Engine Knock

[Zafree]

Originally Posted by Simmy

could it be the vac pump these wear an become noisy.

Hi Simmy,
a few months ago I replaced the broken diaphragm on the vacuum pump and it works fine now.

I also checked the vacuum hoses for leaks, but I couldn't find any.

The only "weird thing" I noticed was the behavior of the pressure gauge if I connect it between the EGR governor and vacuum inlet on the EGR.

I will post the video later.

[5cilinder]

Originally Posted by Zafree

Yesterday I replaced the injector with a new one from Volvo, but the problem still persists.

If i unplug the connector from Injector 1 the knock completely disappear?!
I also noticed that injector 1 was a bit more sooty than the other injectors. :/

The question remains if the new volvo injector had the same coded value in vida
1,2 or 3

[Zafree]

Originally Posted by 5cilinder

The question remains if the new volvo injector had the same coded value in vida
1,2 or 3

How can I check in vida what the coded value of the injector is?

[Zafree]

Please, can anyone confirm if this normal EGR valve behavior?
The gauge is connected to the vacuum hose between EGR regulator and EGR vacuum inlet.

https://youtu.be/iWHATQ6xM0I

[xavierx]

Originally Posted by Zafree

How can I check in vida what the coded value of the injector is?

Use VDash from D5T5 to check (and program) the injector code values.

You need an active subscription to do injector coding in VIDA

[Zafree]

Originally Posted by xavierx

Use VDash from D5T5 to check (and program) the injector code values.

You need an active subscription to do injector coding in VIDA

Thank you for reply.

The injectors are already coded in VDash

[Zafree]

I sincerely hoped the problem was the faulty injector, but this is the third injector I have replaced with apsolutely no change, so I doubt the faulty injector is cause of the knock.

What else could I check?