P0455 FORD -

Question

My OBD11 tester says evaporative emissions leak detected. (LARGE LEAK) I have already put a new fuel cap on what should I try next and how do I check the canister selanoid and the fuel pressure sending unit?

Answer 1

P0455 EVAP system large leak detected

P0442 EVAP small leak dtected

You need to visually inspect and feel the hoses, look and feel for loose clamps, Make sure the cansiter vent solenoid is correctly attached to the evap canister, Check also for disconnection to EVAP canister, cracked or disconnected fuel vapor hose or tube going to the intake manifold, The fuel tank filler hose check that for crackes, also the purge valve located near the brake booster,this line tends to break,You can use a smoke machine what they call a evap machine or just use your nose , You can smell fuel fumes and locate the source Has anyone installed a fuel pump recently?The seal can leak there,