When i first got my car it was stupid quick for an old bog standard cti.
The first time i serviced it i discovered that not only the advance and retard pipe wasnt connected
but it also had a bolt screwed into the end of the pipe to block it off, i removed it and put it back to normal. That was last year and i had forgotten all about it until tonight when i got to thinking that either i had just got used to the car or it had got slower so i have taken the pipe back off and blocked it off with another bolt and my god what a difference. Its got the k&n induction kit on it, so is this normal or is there possibly some other modification thats not obvious to the eye?