hello everyone

im back once again with another question

my car is also running quite rich i have deposits all over the back of the car, it also pops and bangs a bit from exhaust im wondering what may of casued this, as on this car you cant adjust manually can you?

I bought the car with an induction kit on it, but it also came with the standard air box unit, im just wondering maybe if previous owner put this on then didnt relise it had to be re-mapped ( or does it)

can i just put the standard one back on the car or could i possibvly cause some damage, was thinking to just put it back on then see how it runs?