leelijian

I noticed the noise when just getting off from highway and waiting for traffic light to turn green. It turns out that whenever the engine gets idle after a period of highway driving, a lound noise with a constant pace "Kacha,Kacha, kacha, ... would start emitting out. The noise is much louder than it when the car doing normal street driving. It is like a guy breathing heavily after just doing some heavy exercise.
Did anyone hear the same noise after you just got off from highway driving? is it normal?
Thanks,

jnguyen

iTrader: (16)

might want to bring it in and let them see. This might be a TSB or you might have to switch to ester oil

Budakai

I hear clutch chatter after a hard run but the noise goes away after 4 mins of idling. Did you put a low grade fuel in by accident?

leelijian

I alway have my oil change done by the dealer. it is about 10K mile. I was told not to use synthetic oil for the first 10K. Therefore, I have not thought of upgrading the engine oil. I am not sure what type of engine oil the dealer has been using for my car. I assume it is a regular oil.
Budakai, I think you are right. The noise does get away after resting the engine for a while. In my case, the noise appears very easily. it didn't really need a "hard run". And it takes much longer to disappear. Low grade fuel? do you mean the gasoline? Recently, I always fill up my gas from a same Exxon gas station. It is always 93 premium. I guess I need to go to a different gas station from now on and see whether the problem will disappear.
Welcome for any advice. going to bring my car in this Friday.
Thanks.

mike1007

I just started to notice the same problem with mine, have about 8K miles. I have never used any fuel below 93 grade.

Budakai

New cars eventually get old. I won't worry about it, you'll know when somthing is really wrong.

G37Rider92649

iTrader: (13)

^ well said

I heard click click click click kinda noise similar too at idle sometimes after a good amount of driving. Pff I dont care as long as you gun it and it still goes, youll be ok

ifinity

iTrader: (1)

also see this updated thread: https://www.myg37.com/forums/engine-...-fast-idle.htm

If your manufacture date (drivers door plate) is 2007 or early 2008, I bet a reflash of the ECU may take care of the sound you describe, which I heard as a knocking knoise last week. I just had my ECU update today for the fast idle, surge on braking issue, TSB ITB07-048a, I believe (since I did not see the final paperwork). ECU software part number went from 23710-jk70c to 86a...16 changes since manufacture?

The click click noise may be more directly related to the VVEL TSB, ITB07-023? But it requires a ECU update as well.

Posting your manufacturing date (or Vin) as part of your signature, or thread, may help nail down some of these problems, I think.

myk1013

iTrader: (2)

Sounds like the VVEL bank2 actuator issue.
I had the TSB done to mine. It was ok for a couple of weeks but its back again, although not as much as before.