Can't take the chaff on XOC anymore. Nice to find another site.

Anyway, I popped the K&N filter (33-2031-2) into my V6 M/T. It seemed well seated and sealed. The increase in throttle response and increase in power, especially below 2000 RPM, was WAY more than I expected. The engine sounds a lot different too. Jokingly to myself I thought, I wonder if it's that responsive cause the filter isn'tsealed and air's getting sucked around the filter.

When engine braking down a steep hill at 3000-3200 RPM it's way whinier than before. It's less throaty sounding and more breathy sounding. So, I thought I heard a hiss. Low and behold, popping the lid at home, there's a hiss from somewhere around the cylinder that's closest to the passenger seat. I dunno if it's normal, maybe it's something spinning I hear, but it sure sounds like a vacuum leak.

WTF?

mikeT

Originally posted by miket

Can't take the chaff on XOC anymore. Nice to find another site.


"Chaff" That's a good one. Quite appropriate. :)



When engine braking down a steep hill at 3000-3200 RPM it's way whinier than before. It's less throaty sounding and more breathy sounding. So, I thought I heard a hiss. Low and behold, popping the lid at home, there's a hiss from somewhere around the cylinder that's closest to the passenger seat. I dunno if it's normal, maybe it's something spinning I hear, but it sure sounds like a vacuum leak.



Yikes, can't help you with that one, sorry. I have a couple odd noises that come and go in my dashboard and from under the hood but nothing that has me really concerned yet.

Well, the dealer agrees it sounds like a vacuum leak. I'm not sure whether the
noise was there before I popped in the K&N. I'll probably swap back to the paper
just so they have nothing to whine about when I get it serviced tommorow.

It would be strange for the filter to pop off a hose on the other side of the engine.

mikeT

Well, no leak.

The K&N makes a nice improvement in the throttle response and boosts power just a bit. It's boosted just enough to not have to downshift going uphill when you'd normally expect to.

As for installation: the directions I got were for a Pathfinder. The filter fits anyway. Ignore the part about pulling out the tray. When you're placing the cover back on the box, you just gotta wiggle it around a bit so the edges of the cover and are flush with the bottom of the box.

mikeT

Well, no leak.

The K&N makes a nice improvement in the throttle response and boosts power just a bit. It's boosted just enough to not have to downshift going uphill when you'd normally expect to.

As for installation: the directions I got were for a Pathfinder. The filter fits anyway. Ignore the part about pulling out the tray. When you're placing the cover back on the box, you just gotta wiggle it around a bit so the edges of the cover and are flush with the bottom of the box.

mikeT

hey mike. i installed a pop charger on my supercharged X, and ever since then, i have had a loud whistling sound that only happens at a particular rpm range, usually 2500-3000rpm. when i increase/decrease throttle at this range, the sound fluctuates on/off, so i'd bet money that its a vacuum leak someplace. did the dealer help you out on where to look for the possible leak that you had? the noise i hear is coming from the driver's side. thanks. :banghead:

Do you realize your post is 2.5 years after the last one in this thread?

Haha...no, i didn't notice the date on his post. Guess i won't be hearing from him. :rofl: