Northstar Engines and System Technical Discussion Discussion, evap solonoid in Cadillac Engine Technical Discussion; is it normal for the evap solenoid to make a ticking noise .its like a rattling knocking noise when i ...
Automobile(s): 2002.5 F55 STS/64500mi, 2004 Ford F150 SuperCab4x4
MD Eastern Shore - Kent Island
Re: evap solonoid
The EVAP solenoid should open only under part-throttle steady speed driving conditions, and then not for long - only enough to "flush" fresh air through the charcoal canister and thus burn the stored fuel vapor in the intake air - fuel mixture.