Hello. I have a strage sound at idle. it looks like missfires but the durametric says no missfires at all when logging. the car has mafless flash on it.

here is the video of what is happening. when car is cold and idling it does not do this but when it is fully warmed up and after drving it hard this is what happens

Anyone ever seen anything like this? what can it be?

 

I could be wrong but I read a thread saying that those noises are completely fine and just related to the timing chains. If thats what you think you hear.. (sorry if this doesnt help)
but I dont hear anything...

 

mine does not sound like this, thats all the help I can give you. Ive heard the 'bolts in a can' sound on some but this sounds different. of course its very hard online. they are noisy engines though.

 

it was a lifter sound. it is gone now on cold car and i do not have it.
I guess 0w40 oil is not a good idea. can anyone recomend me what oil is best to use on 600-700 hp car?

 

Do you have a light weight fly wheel if so that could be the chatter noise that you here ,try pushing the sport button then the eco button if it stops then that is it.

 

Ive heard the 'bolts in a can' sound on some but this sounds different. of course its very hard online. they are noisy engines though.

 

Redline 5W-40 is my recommendation on cars pushing that much HP and that is what I run in my car.