Originally Posted by
cont1204
Was thinking along the lines of a vaccum pipe has had it. Find the one going down to the turbo, it's a thin pipe only a couple of mm thick. Pull it off from the other end (not at the turbo), put it in your mouth and suck. The wastegate should move a little bit. Pit your tongue on it to hold a vaccum. If the pressure releases there's a leak in the pipe. If it holds strong to your tongue, the problem is somewhere else. If the wastegate isn't opening sometimes and you're booting it in third, a sensor further along the system will be detecting too higher boost, that is more than likely the cause for the spanner light.
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