Can anyone help.I have a 03 vy acclaim v6 .it started with missfiring on the way to work. so i took it too a mechanic shop their diagnosis was , Cam angle sensor. DFI Module .All coil packs. EGR Valve. new leads and plugs, Had all these replaced at a cost of $1350. Ever since all parts were changed it now has a miss at exactly 80 kmph or 2500 rpm even in park reving too 2500 rpm, It will not do it cold only when engine is hot. it never did it before getting fixed. THANKS for any advice.