Intermittent fault on S3

ron burgandy

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hi

I have a 2010 S3 remapped with a vwr racing air inflow. It's seems to have developed a fault, its only noticeable on the motorway when I reach around 70 mph it judders momentarily then picks back up again.
Any ideas what the problem could be? Could it need a high pressure fuel pump? As it's 322 bhp or could it be injectors.

Thanks
 
vcds scan some more info? specially if remapped, call guys from remap to check what they say.
 
Is that in 6th? Did you check your HPFP cam follower recently? It could also be plugs. As above, get the car scanned.
 
Had my car scanned today and "no fault found"
I'm going to run without the maf and see if there any difference