Juddering under acceleration

[Beardy]

Hi peeps, i got abit of juddering wen accelerating, it feels like light rumble strips. Its not all the time either and not got a clue what could be causin it. Its a 04 Signum 2.0 Turbo with 75k. The turbo is new and was fitted about a year b4 i bought it and ive just given it a full service.

[Beardy]

any1 got any ideas? its only under heavy acceleration and only sometimes

[Caveman_nige]

coils, well known mate, well it is to me at least..

check your spark plugs first.. if they are fine then try swapping your coils around..

I have had to replace a couple now and keep a spare in the boot. mine went about the 70k mark..

http://www.ebay.co.uk/itm/VAUXHALL-V...item4abda2bfb5

if you could read off your fault codes it would give a better indication of the fault, cylinder misfires on this engine tend to mean a coil failure