I installed a CAI and I have a distinct high pitch whistle / hiss that I noticed before, but is now more noticable. I looked it up and found that it may be the jet air fuel mixer that may be obstructed. I pulled the tube off the intake and put my thumb over it. The whistle stops, but comes back when I let my thumb off the openning. So it's definitely the jet air nozzle, but what do I do about it? Does anyone know how to service this?????

 

There is no servicing...it is basically a controlled small vac leak.

You are probably just noticing it more because of the intake

 

Totally normal.

You should hear it on the Grand Am cars! Sounds like a CRJ on a taxiway.

 

correct, but I noticed it long before installing the CAI, just now I know what it is. There wasn't a sound out of it for 4 years, now theres a sound. They have techs diagnose and resolve these issues, but how can I?

 

i have a check valve in mine. Don't seem to notice it much anymore.

 

okay, how about running compressed air through the tube?

 

Just don't blow the hose off the nipple under the intake manifold...it's a beotch to put back on

 

I fixed the whistle! If the vacuum hose from the intake is getting too much air, the noise is very audible. Plugging up the line makes the noise go away, but there is a slight loss of power. I just slightly restricted the air flow enough to almost completely eliminate the noise, and the power came back. So keep in mind that the stock airbox keeps the vacuum pressure just right and if you put on a cold air intake you have to restrict the air flow to the jet air vacuum hose to avoid getting a whistle/ hiss at idle.... Still trying to figure out the squeel it makes upon accelleration... Anyone know what that one is????

 

NO!

That is the jet air bleed. Do NOT restrict it.
It is quieter in stock form because of the nature of the intake.

 

I found out how to make my exhaust quiet by plugging it with a potato.

Also, super glue makes kids shut up quite nicely.

 

Still trying to figure out the squeel it makes upon accelleration... Anyone know what that one is????

I fixed that one easily. I dump a bunch of bleach on my tires.

No squeealing but sure smokes alot.

 

HAHAHAHAHA!!!! Like the potato one... But anyways, don't think I'm an idiot... The system makes noise, but Mazda tuned the system to perform optimally with the amount of air it gets in the stock setup (talking about the vacuum tube, not the intake) When the intake was stock, there were small elbow shaped inserts connecting the tube to the intake. After istalling the CAI, the tube connected directly to the intake, thus giving the vacuum more air and causing a louder whistle. To fix it, I modified one of the elbows to fit in the new intake. The original vacuum pressure is restored, and the noise is completely unnoticable.

 

i noticed the same thing. Is there an easy way to modify the hose? Possibly a zip tie to slightly restrain the air?

 

XD




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sorry for the revival but this was quality.