Intake noise

when I start my truck up in the morning I hear this sucking noise, almost like a vaccuum coming from the intake. This happens until the truck is completly warm. I open the air box and take the air filter out and it gets way louder. any ideas of what this could be before I take it to the shop?

 

is your taco idling fine...no hiccups? The reason that noise gets louder when you take out your air filter is because the engine is sucking in more air...no restrictions...assuming you still have a stock filter...

 

your filter might not be seating correctly and possibly a small gap causing that which if there is id get it fixed asap, last thing you want is all that dust to get past your filter

 

Completely normal. That's what an aftermarket intake is designed to do..suck in more air for increased horsepower.

 

Well I put in a K&N drop in filter in about 3 weeks ago and i thought i would hear a differnce in sound but I never heard this sound when I took the stock filter out.