Smoke Test. EGR has tiny leak. Normal ?

[cecilbridge]

2004 ford expedition running LEAN both banks. I smoke tested the truck and noticed a TINY amount of smoke coming out the bottom of the EGR valve. Is this normal ? No other smoke leaks anywhere. Codes P0171 and P0174 codes. Help please

 

[whtbronco]

There shouldn't be any smoke coming out of the bottom of the EGR valve. The diaphragm or housing has failed. Just make sure it's not coming from the gasket or the stove pipe connection.