Injector knocking or something more serious?

[BSOD2600]

Instead of hijacking NuclearBacon's thread, figured I'd start my own...

Anyways, in trying to track down why the ECU thinks there is knocking, I started to pay closer attention to the engine knocking on my car. I've noticed lately that after heavy driving, revving around 1000-1500 rpm, there is this weird knocking sound which occurs. Tonight, I made a short recording while idling in the driveway.

Audio recording

Does this sound like injector noise? If not, what else could it be a sign of?

[asc_up]

Sounds like ticking injectors to me, but it's hard to tell without having your ear next to the source. If it's not your injectors then it would be a very slightly deflated lifter.

I'm more inclined to lean towards injector noise.

[555BCTurbo]

I'd say I'm 95% sure it's injector based on the sound file


My 440s were noisy too...but I doubt that's triggering the knock sensor

[Legacy777]

Yeah it's injector noise. The 550's sound the same way.

[BSOD2600]

The past week or two, the passenger side (injectors?) have been noticeably more noisy after driving hard. I'm 100% sure this is a new sound and hasn't been occurring all the time. After ~10 min of idling (while I play with data logging), the noise can no longer be heard while slightly revving the engine. Being that ya'll think my normal noise is the injectors, it possible one/two of them are going bad?
Suppose I could go get them all tested/serviced by Dr. Injector...

[asc_up]

Yeah, if you really wanted to you could take them to Doc Injector. I did when I was having problems and he had them done in about an hour and it was like $95 with tax.