Hmm. Sorry no help on INPA data.

Low comp maybe due to timing problem?

Valve open on power stroke?

May throw a code.

Watched an interesting vid by DiagnoseDan on Youtube talking about an engine that wouldnt start because of mistiming despite a new timing chain. There were pressure transducers and readouts and explanations on pressure spikes from closed valves on power stroke, comparing to a known good waveform.

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04 X5 3.0i auto
03 X5 4.6is