my z has been doing this sound it kinda sounds like "womp,womp,womp,womp" kind of like a rotory engine... now people have told me its the sparkplugs i bought new ones and replaced also i changed the oil to be safe my oil was good since i just cruise with the car... the sounds stopped for a while but came back but now my clutch pedal stays stuck in. Can anybody please help me out last thing i want to do is take it nissan and get charged like crazy. If you need anymore information i will tell you more about the sounds. pls help

 

just bleed your clutch line... if that doesn't fix it, come back.