Hey there all im new to the forum and well im having a problem with my G35. I just recently got the covers replaced forgot the name but its where the fuel injectors go into, but a couple days later now there is like a popping noise coming from the exhuast and it shakes the whole car. It is similar to someone popping air out of the mouth cant find out whats the problem and seeing if anyone has had a similar problem thanks in advance and have a nice day.