Hey guys,

taking my z to get it looked at 2morro and wanted to know if n e one here has had a similar issue or knows whats going on. When im at a light i hear a slight knocking sound coming from the engine....also, the car feels like its gonna stall, but it never does. Does anyone know what the problem could be??

 

I'm not real sure but are you using Premium unleaded? I know if you dont use atleast 91 octane the engine will knock.

 

I have only used premium unleaded since I bought the car

 

anyone have any ideas?

 

 

^^^that was mean, lol

 

my 05 Z does the exact same thing. 1st off its not knock. if it was knock you would know, car runs like crap, its REALLY LOUD and the ECU would pull mad timing. ive brought mine to nissan and the only thing they could tell me was to use a nissan oil filter. if you dont have a nissan filter on there, make sure you use a filter that has an anti drain back valve like the K&N filter does. prevents oil from draining from the top of the motor back into the pan after the engine stops to prevent dry starts.

i went in about this problem over 5 months ago and 5000k miles ago. still makes the noise to this day. when i start the car up i dont hear it. seems like once the oil gets hot though i hear it. not any worse or better since the first time i heard it. tech told me after a few oil changes and going back to the stock filter the noise should go away. Hasnt gone away for me yet but i have only changed the oil twice since the noise started.

as far as i can tell from reading similar threads, its a common issue. IDK what it is, but it doesnt seem to rob power, im not getting metal in the oil, no smoke, so i assumed its just a low idle.

 

right now theyre saying its coming from the clutch area....regardless im having the clutch replaced cause i need one. but they tightened something, i forgot what it was. And they are looking at a bearing

 

well let me know what they say. btw just wondering what oil filter you have and if you have any mods on your car.
also does the noise go away if for instance you were in neutral with the clutch pushed in or out?

 

i have 19" Iforged Retro's and a custom interior on an 05 yellow base.....no engine mods. im more into the look of the car, def love the performance though. the oil filter is the stock one that came with the car. ill keep you posted

 

thanks, id love that noise to just be my clutch. i also need a new one
the first time you hear it its VERY alarming. i thought my car was knocking as well and flipped out.

 

same!!! it came from out of nowwhere! im hoping its the clutch and not something major

 

one other thing is i get the car gonna stall thing at a light as well but only with the a/c off. if the a/c is on no problems. but yea off it does seriously feel like its gonna die

 

it's the clutch. There's a damaged spring in their causing the noise. Also, they are replacing the whole clutch mechanism. The flywheel is fine. All in all im basically just getting a new clutch. Nothing major....j1234, u should get ur clutch checked out i guess

 

Ahh thank you. one other thing. could you hear the noise regardless of the clutch position, ie clutch pushed in or out?

 

ya it didn't matter what position the clutch was in

 

AH HA, thanks. i honestly was worried about bringing the car in with mods and them voiding my warranty. but thanks now it makes alot of sense. guess its a new clutch for me!!