[coxstan]

hi i have a laguna 2 v6 auto whilst driving engine light flashes car runs lumpy turn engine off and on again continues as normal i have changed all coil packs and plugs still the same if i drive the car and dont let it go over 2500 revs its ok as soon as it passes that rev it flashes and runs like a dog and i need to change gears manually any ideas please thanks
steve

 

[vitasik]

Try Crankshaft positioning sensor or alternatively if fitted camshaft positioning sensor. In my opinion that would cure the problem.