I installed my JWT popcharger about 1000 miles ago and its been sounding great until recently.

During acceleration, even low rpm I had the hissing sound. I went for a ride last week and it took alot of pedal to get the sound. Like I said during low rpm I had the sound now its gone. Its still there at mid to higher rpm though.
I checked for anything clogging the filter and there was nothing.

Anyone have any ideas?

 

maybe is dirty?

 

it's common with all of the cai. the most plausible thing i've heard is that the sound is the increased air flow passing over the throttle body as it opens at certain angles. others have said that its the fuel pump or the maf sensor, but i'm not all together sure whats causing the hissing sound. at first i thought it was the air passing over the lip of the cone filter in the airbox, but even with an open topped filter the sound is still their.

 

um....i think you read the post wrong. he knows what the sound is....he wants to know where it went.

also...i've been saying this for a while now...this forum needs a spell check button or one of those grammar check buttons (like in microsoft word)!

 

oh, yea my bad i didn't think anyone would want that sound to begin with. it sounds like one of those cheap *** exhaust add-ons that makes your car sound like you have a bov. i hope that everyone can read this, you have to forgive me because i'm not quite literate and am borderline retarded.

 

haha. i was just joking anyway. half of the time i spell even worse!

it's just more air rushing in...that's the whistle.

i'm not sure why it would go away....maybe clean it and re-oil it???

 

Adaptation...

You have gotten used to it.

 

I couldn't have gotten used to it, I only drive the car once a week if I'm lucky.

 

I would second the adaptation remark. Even though you only drive it once a week, you said yourself you have 1K miles on it.

I have about 1k miles on mine, and the only sound i can really hear anymore is (what i think) the throttle plate whistling.

If you want her to whistle you have to touch her right.

I can usually get a nice scream with 1/4 to 1/3 throttle at about 3900 rpms.

 

It still does it then. There is a hill right by my house and whenever I drove up the hill even at low rpm I heard it. Now its gone thats how I know its changed. Also out of the 1000 miles 500 of them were driving back and forth to a Z meet, "Mostly turnpike".

I'm starting to wonder if the outside air temp has something to do with it?????

 

I think mine has become a little quieter down low also. I figure the ecu detected more so the throttle body doesn't open as much. Just a guess....