our old dga 2500 and the 6000 we had both did the same when we got the eobd pickups as does the 6000 where im now working so im saying normal operation.seems to just give a random rpm reading-typically 3500 or thereabouts-rather than the 5k you just revved it to with 6 wildly different rpm readings being pretty normal and youre right,can make it look like youre fiddling the test.you will also notice that as soon as you rev it to ANY level let alone rev it out it will accept that as a valid test but no fraud incentive there obviously.not our/your problem.we didnt approve em the ministry did and they can argue the toss if they aint happy with the readings.personally i liked the old omitecs,accoustic trigger saves all this shite slow as they are
