This is happening occasionally on my saff,but don't know which is causing which if you know what i mean! Wastegate is sticking open slightly so no,or very little boost,usually happens going 3rd-4th. If i tap wategate lightly it snaps shut again so looks like actuator spring is ok. What would cause the wastegate to stick? The turbo has only done about 10k since it was recond'. Any ideas?