Just fitted a new aftermarket mechanical fuel pump to my (4K) Ke30, there is the Main Fuel line in and the Main Fuel line out, there is also another smaller outlet on the pump and im quessing this is the Return, the Ke30's don't seem have a return to the fuel tank so do you just block that one off?, car seems to run good as gold with it blocked off, looking forward to your comments.
Cheers.