Weird Hum noise on cold start in the morning and at only 900 RPM

Ok this is driving me nuts but I get a weird humming noise up front it seems when its usually cold or first start taking off in the morning. It only happens at 900-1000 rpm ONLY!!!!!! It can be either in drive or neutral but notice it mostly when I turn the wheel little. NO vibration from it whatsoever. Anyone know what this could be???

 

Is it right at startup, then goes away after several seconds? There's an air pump that pushes fresh air through your exhaust to dilute the dirtier emissions from a cold engine at startup.

 

I know what u mean thats a different hum. Not that one! Lol

 

Mine starting doing a vibration sound about a year ago. Only when it is cold at high idle and it goes away when I start driving.

 

Yes it sounds like a vibration noise without the vibration

 

it sounds like it's your air box.the connection that goes into the inner fender vibrates against the fender. mine had this same noise until I replaced my stock intake for a trd

 

It sounds like this thread: https://www.tacomaworld.com/threads/flutter-or-rattle-noise.473939/#post-14387744

Like desertrunner24 said, it sounds like your air intake hose.

 

not really that sounds a bit harsh!, mine is not as bad! that noise seems constant!

 

I had a similar noise, it was heat shields on the exhaust. Added someone high quality hose clamps on it and it has been good for the last two years.

 

I will check that, matter of fact now that you say that I did change the air filter about month - 2 months ago and I don't remember it doing that before then so could of shifted perhaps!

 

yeah mine made the noise at about the same rpm and when I would put it in reverse and turn left or putting it in park and letting it idle. it seemed to be more frequent when I had a passenger. it was weird. not its gone though