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vectra v6 flat spots

2K views 6 replies 6 participants last post by  phunky monkey 
#1 ·
can anyone cure flat spots on the v6 2.5 heard rumours dont know what to believe, any more suggestions. :mad:
 
#3 ·
the flat spot is a characteristic of the variable length inlet tracts - the flat spot comes from the change over. An ECU update on my Vectra GSi helped smooth it out a bit but its still noticeable.
 
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