hi, as said this could be a sign of a small boost leak, the inlet elbow is defiantly a good place to start i could mine was leaking by running a bead of washing up liquid over the join while running then give it a burst of throttle while looking at the joint and if it leaks will bubble. i have had to seal mine twice now as it was leaking when i got it and the silicone i used the second time was shit this time u#i have used proper gasket sealant had has held fine (proved with boost gauge)
doing the egr at the same time i would personalty recommend and cleaning the elbow to get rid of allot of shit that the egr kicks out you can buy a blank or just make it your self out of a bit of sheet metal.
if you are concerned about it possible being a boost issue then as the elbow is off drill and tap a out let and add a gauge, you can always be sure then its right boost level.
even tho the car drives worse without the MAF connected it still doesn't rule it out completely could still be faulty just less likely.
i cant comment on the smoke as that's not a problem i have had but many have said it could be a sign of a egr problem.
hope this helps Jake
doing the egr at the same time i would personalty recommend and cleaning the elbow to get rid of allot of shit that the egr kicks out you can buy a blank or just make it your self out of a bit of sheet metal.
if you are concerned about it possible being a boost issue then as the elbow is off drill and tap a out let and add a gauge, you can always be sure then its right boost level.
even tho the car drives worse without the MAF connected it still doesn't rule it out completely could still be faulty just less likely.
i cant comment on the smoke as that's not a problem i have had but many have said it could be a sign of a egr problem.
hope this helps Jake