SilverA8oh

Hoping someone can help on engine light system too lean. Have installed new billet air intake arms, new air intake pods, new fuel pumps (both), new motor and trans mounts and still getting fault codes. She runs like champ but cannot trace down the cause of fuel too lean codes that return after 50-100 mi. Slight leak on the right side valve cover gasket but not dramatic (never been touched). 150K mi. Unfortunately I have emissions this month :-( Thanks for any help.

jakematic

Vacuum leaks, Lambda's, and/or MAF are typical culprits.

Post up a complete AutoScan and we'll have a look.