Dodgy injector
 

Hi all,

I recently bought an A4 TDI 130 bhp remapped to 150bhp noticed a juddering when idling and driving in the lower revs had a main dealer look at it and they said it was a blown injector and quoted me 500 euro for a new one is this a common problem with A4'smy one has been re-mapped to 150 hp could this be the cause or do the standard injectors need changing.

Any help!!!!!!