Ok, so recently about a week ago I started hearing this buzzing noise coming from the front of my car. I thought it was just the front diffusor on my Spoon bumper rubbing against my splash guard. With the raining weather approaching soon I figure I should just put back my OEM bumper.
The buzzing noise continued. The only things I recently installed was Spoon snorkel and Spoon ETD w/ heatshield and that was about a month ago. I removed my ETD and strutbar and Snorkel, and the buzzing still continues. I am about to remove the Spoon heatshield next.
I removed my Spoon wire cover and saw that three of the spark plug bolts were loose. I tightened those and the noise still continues. Could there be internal damage in the engine causing this buzzing noise?

Heres what I know. When in gear and starting to accelerate at about 2-3k rpms the buzzing starts, then fades away, 2nd and third gear do the same at about 2-4k rpms, then fade away. After about 40 mph I can't hear anything because of my exhaust so I 'm not sure if the buzzing completely goes away. When decelerating or downshifting while in gear the buzzing starts at about 4-2krpms in 3rd, 2nd, and first gear, 4th and 5th gear I'm not sure because the exhaust noise is too loud.
Another thing, when the buzzing starts I can put the clutch in and the buzzing stops. Also when the car is at idle, the buzzing will not start. I think the engine is causing something to vibrate at a certain frequency. Does that make sense?

I almost need to take off my hood and have a friend sit in the engine bay while I drive to distinguish where this buzzing is coming from. I have too many aftermarket parts to list which could be problem. I'm sure something is just vibrating but could it be something internal in the engine? Any help or ideas please!

 

clutch buzz, isnt it?

 

No, he gets the it on accel, and in first gear - either one rules out clutch buzz. It most likely is what the OP said, something vibrating at a specific frequency. My guess is a heat shield.

 

Ok, so I checked numerous parts and its still buzzing and Its not clutch buzz.
I was able to have my girlfriend stand by the side of my car with the hood up and listen while I move forward. She said it sounds like its coming from inside the engine under the valve cover.
I'm worried cause earlier today I found three of the four spark plug bolts loose and the ignition coils backed out, not completely cause the coil cover was holding them in place, but enough to make the suction noise when pushed back in.
If I had been driving around like that for the past week, could that have caused enough damage to start making the buzzing noise? What kind of damage am I looking at if that was the problem?

 

Bro relax a little bit, having a coil on your plugs not connected will not damage your vehicle. I have a vibration @ 4,500 rpm that sounds like the car is going to blow and I havent been able to pin it down yet, but Im sure it is not anything major and you will find the culprate. Just my .02

 

Does the car have to be moving forward for this to occur, or will it buzz at the appropriate rpm while standing still?

Separate thought: have you checked the spark plug torque? 18 lbft, I believe.

 

The car has to be moving, it will not buzz if standing still and ajdusting rpms. I will check the spark plug torque. Any other thoughts?

 

I have the same exact noise coming from my engine bay.
I had my friend take a look at it and he took a educated guess that i might need some Valve adjusting.
I dropped off my car with Billman250 for other work and he said he will take a look at it and let me know.
I'll let you know what he tells me.

Marcus

 

[QUOTE=SDUECE,Oct 8 2006, 02:46 PM]The car has to be moving, it will not buzz if standing still and ajdusting rpms.

 

Ok, after further inspection, I can slightly hear the buzz when in neutral and rev the engine, but I can hear the buzzing better when driving. It sounds like the buzzing is coming from the cylinder hear or around the fuel injectors. Its not a clapping, tapping, or ticking sound, more like a buzz like a bee. It definitely doesn't sound like when I first bought the car.
I have 32,000 miles and I have had the valve cover replaced in favor of a powdercoated one if that would help narrow things down.