Looking for comments on this issue on my 6MT Sedan:

When I tap the gas from idle, I hear a quick squeak before the revs climb. Sounds like the valve in the throttle body (Correct me if I'm wrong: by throttle body, I mean the thing that the intake tube connects to) is scraping against the body itself.

During low end acceleration (under, say, 3000rpm), I can hear a longer, higher pitched squeak (sounds like a dusty brake) that stops when I let off the gas.

I noticed the first part of the noise right after I put in the Z intake 3 months ago, so I'm guessing I did something. In the last week or two, I'm noticing the squeak during acceleration.

Any ideas on what to do?

 

Take off the Z tube and make sure everything is copacetic!

2003 TwBlue 5AT Sedan, sunroof,
Graphite Leather, splashguards, HKS exhaust,
14 wire Grounding kit, 350Z duct, Stillen CAI
Underbody rear diffusers, Drilled alum pedals

 

What do you have the Z tube connected to...A Pop Charger?? or the stock air box?? I had the same thing, and it was the Pop Charger whistle...I just changed to a Nismo CAI, noise is gone....

 

My Z tube is connected to the Stillen HiFlow AirBox.
I love the combination!

2003 TwBlue 5AT Sedan, sunroof,
Graphite Leather, splashguards, HKS exhaust,
14 wire Grounding kit, 350Z duct, Stillen CAI
Underbody rear diffusers, Drilled alum pedals

 

Nope - just the stock box with ghetto mods - closed off the lower resonators and stretched the "Power Duct" to expand the opening.

 

Sack,

My '04 6MT sedan does the exact same things you describe; it's been bothering me because I just noticed it a few weeks ago. My car has 8000 miles/8 months on it; intake mods are Z-tube and K&N filter only.

I'm anxious to see any additional posts here. Very good description of the sounds; I wasn't sure how to explain it.

 

DEJim - glad to know I'm not the only one with the problem on that setup. Still don't know what to do about it.

I took off the tube and checked the valve - It seemed to move fine and with no scraping or contact.

After reinstalling the Z-tube, I used a stick to rev it a bit while getting my head as close to the throttle as possible. The initial squeak sounded like air getting sucked past a closed valve - I'm guessing it's caused by the vacuum created in the split second before the throttle opens up.

Could not replicate the squeak during acceleration.

Anyone else with ideas?

 

I have the exact same sound under the same conditions. Except I have the stock intake.



2003 G35 Coupe 6MT/Black/Graphite/15% tint/6 wire GroundingGear™