Hi
We have a 2008 BMW 1 series 118d with fault code 4933 - air to EGR mass flow, plausibility permenant. normally comes on at slower speeds, no performance issuse with engine when fault appears.
Removed inlet manifold and removed intake flaps, cleaned inside manifold, bead blasted intake valves and ports.Replaced electrical part of EGR valve, checked EGR bypass vacuum unit and pipework working ok. Replaced intake pipe from MAF (was split). Smoke tested no leaks found!
Anyone have any more idears please!
We have a 2008 BMW 1 series 118d with fault code 4933 - air to EGR mass flow, plausibility permenant. normally comes on at slower speeds, no performance issuse with engine when fault appears.
Removed inlet manifold and removed intake flaps, cleaned inside manifold, bead blasted intake valves and ports.Replaced electrical part of EGR valve, checked EGR bypass vacuum unit and pipework working ok. Replaced intake pipe from MAF (was split). Smoke tested no leaks found!
Anyone have any more idears please!