hi all,i have a slight judder just before boost kicks in on my bugeye.anyone got any ideas why

ive looked at the plugs and they're almost new they were changed 1000 miles ago

 

orite fella,i bought my imrezza wagon 2 days ago and mine does exactly the same on the build up to boost it seems to judder,as if it spluttering a bit.are u any wiser to what it is as mines still under warenty so im trying to find the problems now before i get ****ed over.

 

no mate,sorry im still waiting for anyone to give me an idea, keep an eye on this post just incase anyone has a stab at it

 

what mods have you had done??

 

airflow meter?

 

maf or lambda problem affecting fuelling maybe?

or even plug gap a bit big read somewhere that it is recomended to have gap slightly smaller than what subaru say to avoid problems when boosting?

try cleaning the maf and regapping the plugs

 

thanks for your replys,the only mods are a decat 2nd pipe and a backbox. as for cleaning the maf does anyone know wht to use