How do I get the map and maf sensors checked?, and where are they?, is it a check for cleanliness or an electrical check, can I just blank off the egr valve as I have done on my ford transit mk 7 without any ill effects or will I need the by-pass pipe I have seen for sale. I am new to these engines and don't know the layout yet, haven't even taken the engine cover off until I receive the thermostat.
Roy
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