Hello there I ask you of the forum for an opinion on a speech that at times creates discussion with my partner....he argues that the exclusion of the egr valve on cars that are equipped with fap/dpf is not a proper operation and is pi? problems than gains.ie, to his words l exclusion lengthens the time of regeneration and the amount? of regenerations.I'm rather of the opposite opinion....on my 159 2.0 jtdm not l I is still closed due to this reason....but you say to me?