The car sounding like it has a cam at idle is an indication of a vacuum leak .
Change the upper intake gasket the next time you have it off to replace the injectors . The egr has no reason to leak if you didn’t touch it . If it came off with the upper intake then you didn’t disturb it I can’t see it leaking .
Make sure you got the hose for the pcv re connected as well
Change the upper intake gasket the next time you have it off to replace the injectors . The egr has no reason to leak if you didn’t touch it . If it came off with the upper intake then you didn’t disturb it I can’t see it leaking .
Make sure you got the hose for the pcv re connected as well

pretty hard in a stick to put it midly.