Hi hope someone can help I've a vectra 54 gplate it's a 2ltr Tdi have had two faults namely p0100 so replaced maf which cured that then p0400 so have replaced egr valve. Also cleaned top part of intake manifold which was full of black carbon sludge. The boost pressure sensor looks damaged slightly but main problems are 1st start of the day there is a lot of white smoke which does clear also seems too have a nasty flat spot around 2500 revs which does cleared also egr fault appears around 2750revs in fifth gear. Is there anything I could spray in the intake manifold to clean it
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