Thanks for your input Stews. All posts on this subject are gratefully received. I don't know of any other direct connection into the manifold and/or swirl flaps area, other than the obvious ones... ie air goes in with or without exhaust gas fed back via the EGR, gets compressed in cylinder, diesel mist is injected in under pressure, and "bang" - down shoots piston again! At some point in this sequence, when its happening slowly at idle speeds, something happens to flip a sensor from normal to abnormal condition, which sets off the sequence that engages the limp home mode and sluggish performance. Only happens when engine is hot..!!! Could it be a clogged crankshaft sensor that looses the inductance trigger at low speeds? Has the crankshaft sensor lost some of its magnetic force so it no longer responds at slow speeds...???? I don't know how to test that practically. Keep thinking everyone + we have to be able to crack this in the end. Keep up the good work, we will get there! Good luck... Robin
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