My Td5 has developed intermittent boost on the turbo - sometimes it builds it really quickly and sometimes it’s just dead flat. As in foot to the floor and it just won’t build revs.
Sometimes I can down shift to build revs and get some boost - and sometimes it will just suddenly build boost as normal.
When it is on boost it seems as strong as ever.
Nanocom is giving no faults.
At first I thought the wastegate wasn’t sealing shut properly - but it actually seems to be moving really nicely.
Unlike the Td5 discovery there is no solenoid in the actuator line - it’s just plumbed straight in.
I did wonder if it could be the pipe work leaking or collapsing - but I can’t see how that would be inconsistent?
Anyone help me what could cause it ?