car came in with severe misfire code (cel blinking), my co technician change the following not knowing that the misfire actually happens intermittently>>>:

with the following parts installed (car keeps coming back)

spark plugs, 4 coil on plugs, new fuel pump (identifix recommendation), cleaned egr and passages.

with all those replaced, i got a chance to look at the car today and i noticed it was running lean with LT fuel trim at +10 to 14%. sho rt term at 10% + side.

anyway, manager let go of the car but i know for a fact its gonna comeback again.

guys got any ideas??? o yeah , tech smoked the intake and no leaks there, no vacuum leak.