I don't post much in here because I'm usually able to find out what I need from other people's posts, but this situation is one I'm not sure what it is related to.

I have a 2006 TSX auto transmission with 183,000+ miles. Whenever I'm sitting at a complete stop at a red light, I hear a funny noise that almost sounds like pinging popcorn with a mix of a sputtering fan?

The noise doesn't occur right away (don't hear it at stop signs) and it will go away as soon as I left my foot off the brake pedal.

I've had my serpantine belt replaced within the last few months, so I know it is not that.

When I pop the hood with the engine running and car in park, no strange sounds.

Any advice and cures would be appreciated.

 

Suggest checking cooling fans for a loose or damaged blade. Might be some evidence of fan hitting radiator. Just a guess. Not much rotates except accessories and electric fans.

good luck

 

if you shift it in N or P and noise when away, it likely have something to do with transmission..

 

Thanks for the responses.

The sound definitely goes away in neutral and I don't notice it as much when in park, if there is one at all. I guess I will have to get the transmission checked out then.

Any chance it has to do with a catalytic converter? Just had my emissions test done recently and the error code from the test means either I need to replace an O2 gauge or replace the catalytic converter.

 

It ended up being a rusted and loose shield for the cat converter. They just removed it. Anyone know if I should get a new one or if I can make do without it? I would think it was there for a reason. Mechanic said just don't drive over dry grass.