so the other day i noticed the engine light came on when i came to a stop i proceeded to go noticing an extremely bad rumble. its coming from cylinder #3 im pretty sure ive been told that it sounds like a weak coil pack but i have no idea. then again i heard it could be a vacuum leak or intake. but any suggestions or anything would be helpful. its a 94 300zx n/a. the engine light goes on an off at random times but when its on the car rumbles really bad and runs terrible but once it turns off its fine again... i dont know alot about this car so anyones input would be helpful if it could save me some money. also heres a video if u can hear the difference.
http://www.youtube.com/watch?v=ZidCT...e=channel_page
in kind of has a ting to it sounds funny