Ok, so i think this is unrelated but 2 weeks ago i installed a DIY CAI for my 08 MC, and it has been running fine although a bit louder which is what i wanted anyways. Well, today I took it through a touch less car wash and after I now hear a clunk,clunk, clunk noise when I come off the gas. Going above 20mph I hear it when I let off the gas, put the clutch in( it seems to be a bit louder when the clutch is in) and when my foot is on the dead pdeal I can feel it through the floor. like I said I think the CAI and timing of the sound is conicidental, but it feels like its coming from the left front wheel well. Oh, also when I apply the brakes the sound goes away, but when I let off the brakes and put it back into gear there seems to be a slight "slapping" noise when I re-apply the gas. I'm thinking maybe a CV joint? but 31,000 miles is too soon for that kind of problem isn't it? Any suggestions would be greatly appreciated before I call the dealer and take the 3 hour drive up there.

 

it could be the sound generator, did you remove it before installing the CAI?

 

yeah, everything back to the MAF has been removed.

*edit: i just checked the intake and there was no moisture in there.

 

Any work done on the sway bar, sounds like it could have come lose.

 

nope nothing suspension wise has been touched.

 

Get it up on a lift and have a qualified tech look at it asap.......IMO it sounds more like some sort of under carriage damage from the "touchless" car wash ?

 

You could also have a rock or other road debris lodged in your brake pads or a high spot on your rotor. +1 on the qualified tech doing a visual inspection ASAP.