hey everyone..i was just driving home from mates house last night and just as i pulled into my drive way i push that button to turn your fog lights on.....then i switch it off...the button next to it i didnt know what it was so i pressed it and it made my revs all funny...just going up and down 1000rpm and the car was slightly shaking i turned it off...and the car was still doing it...i turned it back on and it was fine just sitting on 1000... what does that button do lol??