i had previously thought it was my power steering pump, but i fixed that issue. ive been runnin 87 for a little while now because of a lack of money, but i havent had any issues until last weekend. its barely noticeable, but you can hear it full throttle from about 2500 up. i check the front two drivers side spark plugs (bosch double platinum), and noticed the one had a bent prong. otherwise, they looked normal. i have noticed that it doesnt knock like it did when i opened it up when i ran 89 (like one cylinder knocked when i mashed the gas). i am going to try running 89 again, but i want to check the timing as well. i have a timing gun. what would the recomended timing be since my car is a daily driver but i also cruise and street race on the weekends