Maf makes whistle noise!

[biggee247]

The MAf when driving and also when rpms are coming back down will make a whistle noise? RB20det stock maf. Unsure as to why it would do this.

[Joe]

what?

[biggee247]

When you are driving and you let off of the gas, so rpms are dropping, the MAF will make a whistle noise.

If you rev up and let off it will make a whistle noise.

The maf whistles, i dont know how to better explain. What could make the MAF whistle.

[Joe]

...thats your blow off valve. the excess air escapes from the MAF.

[Cjmartz2k]

LOL

[biggee247]

No, i know what the BOV sound is dude, im not an idiot. It makes an actual whistling sound, only every now and then even when car is idling from the MAF.

[Cjmartz2k]

Well, if you're sure it's coming from the MAF, look around for small leaks, tighten up the clamps in the area, and just jiggle things around to see if it fixes it. Post a video up if you like. Might help. Kinda tough to tell from just your description so far.

[USMCgetsome]

keep in mind your throttle body does pull in vaccum at low idle and rev before boost is applied. You just might have a loose vacuum hose.

[Neejay]

Do you have a cone filter?

[biggee247]

No cone filter!

[Carl H]

sooooo you're describing basic turbo operation here?im lost.

[USMCgetsome]

TAKE VIDS! PUT EM ON YOUTUBE IF YOU'D LIKE FURTHER ASSISTANCE!

[DrifterProdigy85]

Its your BOV. Mine does the same thing at light throttle around low vacuum and 0psi. Stock BOV's leak a little bit (at least mine does) and under light vacuum and when a little boost comes in you can hear it whistle.

[biggee247]

http://www.youtube.com/watch?v=rSBrMjcXHIE

this is a video of it...

[biggee247]

http://www.youtube.com/watch?v=KstAz2xy0v0

another one.

and then is what the car sounds like when at full throttle with my rb20, seems to be maybe coil packs and harness

http://www.youtube.com/watch?v=AuerpZfD_n4
Modified by biggee247 at 6:21 AM 8/25/2009

[rb25det250sx]

LOL

if your talking about the loud high pitch noise thats wierd. but i hear a whistle when you first get on the throttle and thats just cuz its sucking in air.

[biggee247]

Its your BOV. Mine does the same thing at light throttle around low vacuum and 0psi. Stock BOV's leak a little bit (at least mine does) and under light vacuum and when a little boost comes in you can hear it whistle.

Its not the bov because its coming directly from the MAf. If i put my ear up to the BOV, it's nothing. If i put my ear to the MAF i can hear it louder, trust me, it's coming out of the MAF.

[biggee247]

LOL

if your talking about the loud high pitch noise thats wierd. but i hear a whistle when you first get on the throttle and thats just cuz its sucking in air.

Yes im talking about the high pitch sound. I know when i rev it will suck in air, just when it's idling and it's real high pitched whistle.

[maryjane]

wow!

[biggee247]

wow!

Wow! what. If it's something ez or stupid then tell me. but it's loud as hell and freaking me out. First time ever to have a turbo car, so little things freak me out. Yet considering the fact that the car is dogging down like hell, you cant push on gas at all, im thinking it's either the coilpack harness or maf. Idk if it's the turbo or not.

[biggee247]

Anyone? I posted videos like you guys said. If it's something stupid, just say it, i dont care.

[Neejay]

Mine did the same thing like the 1st video, at idle. It was audible at my cone filter...that's why I asked if you had one, but I see you don't. The cone filter I had at the time, was a cheap mesh one that you can see through. It's almost like not having one (like you). All it is, is vacuum. Notice how it goes away when you rev?

Ever since I replaced the cheap, mesh cone filter with an apexi adapter/filter, I don't get that sound anymore at idle.

[biggee247]

Mine did the same thing like the 1st video, at idle. It was audible at my cone filter...that's why I asked if you had one, but I see you don't. The cone filter I had at the time, was a cheap mesh one that you can see through. It's almost like not having one (like you). All it is, is vacuum. Notice how it goes away when you rev?

Ever since I replaced the cheap, mesh cone filter with an apexi adapter/filter, I don't get that sound anymore at idle.

Okay, as long is its nothing big. I was just hoping that it wasnt like a bad maf or anything, because the car dogs down reallly bad. Yet im pretty sure it's the coil pack harness. All the clips broke on the harness and i had to put each little plug on each coilpack.

I highly advise you to buy a new harness if the clips break, it's hard as crap putting those back on w/no clips, lol.

[S14-NEO]

my bone stock 95 maxima does the exact same thing man....all i have is a K&N drop in filter in it thats it....nothing to worry about...

[wabisuke1]

i know what your talkin about man my maf did the the same thing when it crapped out on me never whistled until it did. then i messed up some other stuff trying to wire another one in from a maxima. word of the wise if its bad just get the stock one saves alot of trouble later

[l0nestar]

... oh my..

[Neejay]

http://www.youtube.com/watch?v...lated