Originally Posted by Beemw335
The n54 is direct injection, so seafoam wont do anything to the intake valves. Eventually a manual scrubbing/walnut blasting is needed for carbon buildup in the intake valves.
I have been trying to PM you for over a month but your box is full! It's regarding the USB for the JB4! PM me back or txt/call 514-951-6387. Thanks