ok hi guys my name is ryan pietro. i drive an 05 sti , my mom just picked up a black 2004 g35 coupe 6mt with 19k on it. ok well when the car is idoling it has a slight knocking sound about ever 3-4seconds its not real noticeable but its easy to hear if you listen for it. also this is the noise that scares me. when i shut it off it makes a bad knocking sound. several in a row pretty rapid. is this normal if not hopefully you guys could help me. i know on the sti forums the guys usually help me and can basicly identify any problem over the internet. i dont know if you guys can do that, i dont think many people work on their own infiniti's. thanks hopefully i can find help. it still has factory warranty but i just wanted to see what you guys thought

 

i have 19 k on my 04 too and no knocking sounds. take it to the dealer before it gets sirius.

 

kinda hard without a scanner.. but if you can figure out which cylinder its from then it might be a bad coil (plug). does it go away when u rev it up to 1k? our ECU does a good job of hidding it.

i had the same problem on my G but it wasnt the coil. however it could be a good start.. (my car was totaled before i ever figured it out)

edit: do you feel a rough idle? O.o

 

super smooth idle except for that occasion 3-4 slight knock, its not throwing any cel codes, it goes away under any load.

 

off topic but i paid 31k it has every option possible, and has no flaws besides this knock is that a good price?

 

good stuff.. its not SUPER cheap but a good deal =). especially if its flawless.. the "knock" is a pretty common problem with the G i had it for a while.. couldnt figure out what was wrong.. let infiniti look at it really quick and they said everything felt fine and nothing was wrong -_-.. but yeah take it to a dealer and check it out... if the problem is fixed let us know what the solution was..

sry i cant help you nymore.. i know what problem you're talking about tho.. after a long/hard drive is it more noticeable?

 

thanks for your help. that was 31k with tax and liscensing included. navi, aero package, and some 20"s lol. now that thought about it, it was after my mom came back from a 2hr drive. ill check in the mourning and see if it still does it. thanks