This is topic evaporative emission leak in forum Tech Talk at Northern California Ford Owners  .


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Posted by positiveextreme (Member # 4472) on :
 
I failed smog today on my mustang gt. everything passed except:PO455- evaporative emission control system leak detected.

anyone have any easy solutions or causes to look at before going to the mechanic? Thanks
 
Posted by positiveextreme (Member # 4472) on :
 
it's a 2000 GT. I had a full tune up done a month ago, thats the most recent thing done lately.
 
Posted by Adam5.0 (Member # 6995) on :
 
those leaks are really hard to find without a smoke machine. all you can really do is check the lines going from the tank and look for something really obvious.
 
Posted by Ryan_LX (Member # 7089) on :
 
Was the fuel pump or sending unit serviced/changed at all? If so the seals may have not been changed. Or they may be bad if neither have ever been worked on. [patriot]
 
Posted by a302juGRnuat (Member # 10163) on :
 
try the cheapest thing it could be...the gas cap
 
Posted by Ryan_LX (Member # 7089) on :
 
^^^gas cap is tested separately if it was the cap they would of told you. Most likely have a bad seal. Drop the tank and check the seals and lock rings.
 




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