Strange noise when accelerating.

[Andy Aloia]

Hello All,

I have a 2004 Boxster S. I noticed a strange noise while accelerating. It is only while the accelerator is pressed. It sounds like a hollow noise. I did a test by removing the oil cap while the car is running. It came off easy, was not hard to take off. I don't thinks its the oil/air separator as some posts suggest a noise when it fails. The car seems to idle smoothly. The car drives, runs, and shifts smooth except for this noise when accelerating. I hooked up my Durametric. Cleared the codes. Drove around for 10 minutes. Turned the car off. Locked it/unlocked. Then drove another 10 minutes. No codes were ever produced.

 

I am going away on vacation 2 weeks from now and would really like to take the car with me. Please let me know what you think. I'm a newb to the mid-engine Boxster.

I know its a vertical video, but we're here for audio.

 

Thank you for your thoughts,
Andy

Edited June 17, 2015 by Andy Aloia

[Andy Aloia]

Update: I recorded another video with better sound. I removed the sound deadening material over the engine. This sound is non-existent while in neutral. Should I go visit a transmission shop or is it something other?

Thanks,
Andy

[White987S]

Any mods? What engine air filter? Stock or aftermarket? Maybe the prior owner modded the intake and removed/changed the intake plate (forget what it's called).

[Andy Aloia]

Stock as stock could be. I have a hankering its the transaxel or differential. :( Headed to my indy tomorrow. Will update with the results when I find out.

[Andy Aloia]

Results are in. Having to buy a rebuilt transmission.

Apparently something went awry on a 2 hours highway cruise home that made itself known when I drove the car again. Unknown cause. I am not hard on the clutch at all. I'd prefer to keep my cars for a long time. Sad day.