PS I can not see RFN engine code for 2008 807 on autodata?
If as suggested the timing belt failure is a red herring and you have changed the coil pack due to a misfire cuasing low manifold vacuum with no cure maybe the problem is fuel related.
I was sad enough to get some data of skoda fabia when it was running out of fuel and noticed that the throttle angle was open more than usual at idle I assume trying to keep the engine running also causing low manifold vacuum.
What is the injector duration at idle?
I know you have no O2 readings but is lambda sensor and fuel trims telling you anything?
The other reason I mention fuel is because the emissions readings are suprisingly clean for a vehicle with a misfire.
Just my thoughts
hth not hinders
James
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