Greetings All,
I have a strange rattle that has developed. it is a higher pitch than the diesel clacking and seems to be coming from firewall.
I gave 15 second video of me getting on and off throttle. Linkage appears ok?Note air cleaner is self made and give the low pitch growl when on throttle.

Any ideas on the rattle? maybe it is too lean? I am going on a 2K highway trip.
Thanks in advance.


https://youtu.be/m-vwlQU191E