Possibly leaky injectors? Advice needed!

[Snowman]

So i just picked up a 2007 BMW 335 which had new injectors fitted for about 18months ago, real BMW injectors.
Today i uploaded a stage 1 E30 MHD OTS map to the car and now it flies!
I did 3 pulls with cooling runs in between and i hope i eventually can post a link to the log..
Currently im to "new" to be able to post links..

I did find a tutorial on how to deciper the logs and according to that the AFR should spike the instant you step of the throttle.
In the log it takes a while after i had released the throttle untill the AFR spikes, also bank 1 and 2 doesnt really spike at the same time.

Is this something to be concerned about?
The injectors should be basicly new, so i do hope i wont be forced to replace them again..

[RocketSurgeon]

If the injectors are actually new, they will be index 12. The index 12 injectors are very reliable. If somebody threw older index injectors in it, that might be a problem. I pulled all six of my injectors and pressurized the rail, found 2 leakers. One leaking index 5, and one leaking index 9.
I would pull the engine cover and check the injector index in the top right corner after the hyphen. If you have index 12s, I wouldn't be worried.

[Snowman]

If the injectors are actually new, they will be index 12. The index 12 injectors are very reliable. If somebody threw older index injectors in it, that might be a problem. I pulled all six of my injectors and pressurized the rail, found 2 leakers. One leaking index 5, and one leaking index 9.
I would pull the engine cover and check the injector index in the top right corner after the hyphen. If you have index 12s, I wouldn't be worried.

Thanks for the reply, will have a look under the cover tomorrow!