newbie here.
2003 a4 1.8t. keep getting a 16683 boost not reached code. Replaced the diverter valve with no change. Will be fine for a while then trip a code again. Hoses seem ok. Is there a way to smoke test the boost side? I assUme any vacuum line on the manifold would work.
Juggling multiple vehicles with issues right now, hoping this will be any easy one
tia