hi all,my vr6 is seriousely lacking under 3500 revs, but when it hits 3500 it kicks in , is this normal as this is my first vr6 and dont have a benchmark to compare with.ive only had it about a month and have changed the air filter and induction back to orriginal vr6(crappy and very noisy pipercross now in the bin)its been on th diagnostics at vw (£14.50)and come back clear. also replaced catalytic converter but it is still backfiring aswell, can anyone help, cheers.