[randythedrummer]

Developed a loud ticking recently. Thought it was a vacuum leak but not convinced. Could this be a bad injector? I replaced all the injectors in 2018 with index 12. The car is not throwing any codes at all and has 60k miles (100k kms).
Idle has become a bit rough as well at start up with the odd "shudder" at idle when warmed up.

Any thoughts/insight would be appreciated.

[drymite]

Originally Posted by randythedrummer

Developed a loud ticking recently. Thought it was a vacuum leak but not convinced. Could this be a bad injector? I replaced all the injectors in 2018 with index 12. The car is not throwing any codes at all and has 60k miles (100k kms).
Idle has become a bit rough as well at start up with the odd "shudder" at idle when warmed up.

Any thoughts/insight would be appreciated.

Sounds like its knocking

[Saif2018]

Originally Posted by randythedrummer

Developed a loud ticking recently. Thought it was a vacuum leak but not convinced. Could this be a bad injector? I replaced all the injectors in 2018 with index 12. The car is not throwing any codes at all and has 60k miles (100k kms).
Idle has become a bit rough as well at start up with the odd "shudder" at idle when warmed up.

Any thoughts/insight would be appreciated.

That doesn't sound like injector tick, Rod knock possibly or Hydraulic lifters gone?

[Zach1328]

What happens with the sound as RPM's increase? Definitely not the sound I'd want to be hearing. Sounds a bit more serious than anything fuel system related.

Assuming you bought new OE index 12 injecors that's a very very low probability that any are bad. Just sounds too noisy for HPFP.

I would definitely be concerned about a bad bearing. Pretty rare problem at low mileage, but it can and does happen. Usually due to poor oil quality, long oil change intervals, low oil, etc.

[randythedrummer]

I did unplug injector #1 (which I've always thought didn't install as smooth as the others when I did the injector swap in 2018), and the sound was pretty much gone. Just the standard tick that all N54's seem to produce via direct injection.

I do not think it is rod knock at all since the sound/rate didn't increase with any revs.

Here is the updated vid with injector #1 unplugged, I realize that I am in limp mode and the car runs like garbage with the injector unplugged, but the sound is now gone.

https://www.youtube.com/watch?v=9S8gZZfvgCw

[Saif2018]

Originally Posted by randythedrummer

I did unplug injector #1 (which I've always thought didn't install as smooth as the others when I did the injector swap in 2018), and the sound was pretty much gone. Just the standard tick that all N54's seem to produce via direct injection.

I do not think it is rod knock at all since the sound/rate didn't increase with any revs.

Here is the updated vid with injector #1 unplugged, I realize that I am in limp mode and the car runs like garbage with the injector unplugged, but the sound is now gone.

https://www.youtube.com/watch?v=9S8gZZfvgCw

Interesting, what happens when you swap the injector from cylinder 1 to another one?

[torrque]

Injectors can tick/knock as well, just never heard it so loud. Just swap it like @saif2018 said, and see what happens.

Remember with the injector disconnected, there is no "work" being done in cylinder 1, so it's just being moved by the crankshaft...

[randythedrummer]

I reseated the injector and the car is running quiet as a mouse now, less the small fuel purge vent valve tick. New purge vent valve on the way.

[Saif2018]

Originally Posted by randythedrummer

I reseated the injector and the car is running quiet as a mouse now, less the small fuel purge vent valve tick. New purge vent valve on the way.

That's good news

Does the fuel purge vent valve stop ticking when the oil warms up?

I've got a similar tick, goes away after a few minutes of driving,

[randythedrummer]

Thats a good question. I unplugged it for a second just to verify that it was in fact ticking, and it definitely was. It wasn't throwing any codes and was cheap enough so I figured I'd just replace it.