is there a leak somewhere in the manifold.

If you can get the engine to fire up smooth and steady by pressing the reaction plate then Im believing the ignition parts are good. The idle/start control system is not working.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)