Cummins 4BT & Diesel Conversions Forums banner

4bt injectors

  1. Performance Discussion
    During the initial start up of the 4bt in my 1968 Bronco I noticed some bubbles coming up from the base of the injector. After cracking the fuel lines to get fuel flowing I had what appear to be air bubbles coming up from around the hold down nut. I am thinking it's leaking compression and needs...
Top