Engine Buffeting at high RPM (no load, neutral). Problem?

[N-Wing]

So I have been working on an O2 sensor debacle that I finally got resolved this morning. Now that I have no more errors I let the car warm up real good as its been sitting (about a month due to the sensor and me being in CT). After it was good and warm I ran up the RPM just to clear out the exhaust. All was fine. I then ran it up to 7-7.5k RPM for just a few seconds and noticed the engine started buffeting sum. Almost like the rev limiter but a bit less pronounced and I could push it further. Think this is an issue?

Other notes:
1. I do have a small exhaust leak on both pipes. My adapter to an ARK exhaust I bought are not properly seated. I will be fixing that.
2. It a 2000 NSX with 48k miles.

Thoughts?

 

[docjohn]

what exactly is a buffeting engine?

 

[N-Wing]

Almost identical to the rev limiter. The engine sort-of-kind-of loses power and recovers in a split second and then repeats. In the past it would not do this it would simply hold whatever RPM I put the pedal too. Not sure how else to describe. I could record the sound I suppose. Maybe I will do that tomorrow.

 

[Bram]

Hi almost sound's like the car is not fully up to temperature . The gauge may show it warm but the oil temps my be lower, hence the reason for the "Buffeting".

Bram

 

[N-Wing]

Hmmm. If that's the case I am sad I spool'd the engine up that high... I let it sit for 20 minutes but I suppose that is possible.

Well, it won't be leaving the driveway for a few weeks minimum. I will check, once it's back on the road (wheels are getting refinished).

 

[Honcho]

If the car is in neutral the ecu will not allow 8000 rpm. You are hitting the rev limiter- it is just lowered.

 

[N-Wing]

There is an answer... I like the sounds of that...

 

[Xetronic]

I also encountered this same phenomenon and indeed a lowered rev limiter is there for safety when in neutral.

 

[N-Wing]

Great. Thanks all.

 

[bngl3rt]

Hi almost sound's like the car is not fully up to temperature . The gauge may show it warm but the oil temps my be lower, hence the reason for the "Buffeting".

I've actually been wondering how long it takes the oil to warm up/how much time has passed before all the oil has cycled at least once.

Is there a way to "read the tea leaves" of the oil pressure gauge to know if my oil is warmed up yet?

 

[FF Drifter]

Hmmm. If that's the case I am sad I spool'd the engine up that high... I let it sit for 20 minutes but I suppose that is possible.

Well, it won't be leaving the driveway for a few weeks minimum. I will check, once it's back on the road (wheels are getting refinished).

Letting it sit, especially with the kind of temperatures we've been having lately, will not nearly be as effective at bringing the engine up to full operating temperature as it would be if you simply just drove it (gently!) for a little while. I take my car out gingerly in the mornings, but by the time I reach the interstate the engine is warm enough to push.