Lack/Loss Of Power (F150 Lightning 5.4L SC Only)
WARNING: This page is about a different variant/trim than selected.
Check supercharger bypass system operation. Go to TEST KJ, step 13) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. Also check high speed fuel pump secondary circuits. Go to TEST KA, step 70) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.