Weird Hissing After Cleaning Throttle Body http://forums.nicoclub.com/zerothread?id=435206 Weird Hissing After Cleaning Throttle Body en-us 2009-11-22T10:14:13-08:00 hourly 1 1970-01-01T00:00+00:00 Nissan Forums / Infiniti Forums - NICOclub http://images.zeroforum.com/new/1/pixel.gif http://forums.nicoclub.com Re: (Ron Burgundy) http://forums.nicoclub.com/zerothread?id=435206;postid=4900509#4900509 Well K&N told me that there should be a hose which runs under the engine cover. I did some research and found that only the 2001 and 2002 models have this hose, and the 2003 and 2004 models do not. K&N did not know that Nissan stopped using this hose so they inadvertently put a hose fitting on the intake tube. I have talked to the Engineering department and they are looking into this.Thanks for your help!!! Thanks for your help!!! ]]> Pwnin O'Brien 2009-07-10T09:15:08-08:00 Re: (Pwnin O'Brien) http://forums.nicoclub.com/zerothread?id=435206;postid=4898966#4898966 Awesome! Good to hear.Let me know what K&N has to say. Let me know what KN has to say. ]]> Ron Burgundy 2009-07-09T16:15:25-08:00 Re: (Pwnin O'Brien) http://forums.nicoclub.com/zerothread?id=435206;postid=4898310#4898310 Well I replaced the gasket as well as a thorough cleaning around the mating surfaces with a brass bristle brush and the hissing has disappeared!P.S. I also e-mailed K&N Tech support to find out about that hose and they haven't gotten back to me but I'll post their response when they do. P.S. I also e-mailed KN Tech support to find out about that hose and they haven't gotten back to me but I'll post their response when they do. ]]> Pwnin O'Brien 2009-07-09T11:53:57-08:00 http://forums.nicoclub.com/zerothread?id=435206;postid=4892071#4892071 Ok, so I have done some reading and I found out that the gasket should be replaced, even if it looks fine. If the gasket gets even the smallest crack it will cause a whistling sound from the throttle body.I'll replace the gasket and post my findings. I'll replace the gasket and post my findings. ]]> Pwnin O'Brien 2009-07-06T22:58:24-08:00 Re: (Pwnin O'Brien) http://forums.nicoclub.com/zerothread?id=435206;postid=4886882#4886882 That's enough for me!I googled the issue, and came up with nothing.Did you completely disassemble the tbMaybe just for good measure, take it off again and double check your work.I'll keep looking into it and let you know if I find anything. I googled the issue, and came up with nothing.

Did you completely disassemble the tb?
Maybe just for good measure, take it off again and double check your work.

I'll keep looking into it and let you know if I find anything. ]]> Ron Burgundy 2009-07-04T13:18:17-08:00 http://forums.nicoclub.com/zerothread?id=435206;postid=4886399#4886399 Hmmm, I thought maybe it was because I didn't replace the gasket between the throttle body and the plenum, but it looked like it was good condition, I just cleaned it off and put it back on. I'll have to do a more comprehensive sound check around the engine.I love the intake, I don't really notice the horsepower gain (something like 14.4hp in the 5000rpm range) but it makes my truck sound awesome. During acceleration it sounds really good. I love the intake, I don't really notice the horsepower gain (something like 14.4hp in the 5000rpm range) but it makes my truck sound awesome. During acceleration it sounds really good. ]]> Pwnin O'Brien 2009-07-04T07:26:02-08:00 Re: Weird Hissing After Cleaning Throttle Body (Pwnin O'Brien) http://forums.nicoclub.com/zerothread?id=435206;postid=4886309#4886309 I've cleaned my throttle body before and didn't experience this.The only thing that comes to my mind, is a loose connection (especially if you removed the throttle body) and air is hissing out (like whistleing)PS - How do you like the intake I've been debating this... is it worth it The only thing that comes to my mind, is a loose connection (especially if you removed the throttle body) and air is hissing out (like whistleing)

PS - How do you like the intake? I've been debating this... is it worth it? ]]> Ron Burgundy 2009-07-04T04:11:18-08:00 Weird Hissing After Cleaning Throttle Body http://forums.nicoclub.com/zerothread?id=435206;postid=4885739#4885739 So last weekend I thoroughly cleaned by throttle body as it was pretty dirty and hadn't been cleaned in a really long time (since I owned the car). After I finished cleaning it I put it back on the car and reset the ECU and then did a pedal relearn, a throttle position relearn, and an idle air volume relearn. The car runs beautifully and idles exactly at 750rpm's.I immediately noticed, however, when I am accelerating above 1500rpm's, I can hear (with the windows down) a loud hissing sound which gets louder the more I accelerate. The hissing sounds like a turbo spooling up.I checked to make sure that there are no pinched hoses from the intake and everything was reinstalled perfectly. I have a K&N cold air kit on the car. I just thought this noise was normal and didn't really think too much about it, but I now worry a bit that something may be choking. Has anybody else experienced this Does anybody have any suggestions as to what could be making this soundI have another un-related question for anybody who has the K&N cold air kit installed. On the bottom of the intake tube around the filter end there are two hose outlet grommets. I only have one hose physically connected because I didn't have another to hook up. Is there supposed to be two hoses hooked up to it What is the second (larger) hose for Is this a hose used on other R50 models I currently have the larger grommet plugged up.Here's a couple of pics of what I'm talking about from the installation guide: Thanks! Modified by Pwnin O'Brien at 12:42 PM 7/4/2009 I immediately noticed, however, when I am accelerating above 1500rpm's, I can hear (with the windows down) a loud hissing sound which gets louder the more I accelerate. The hissing sounds like a turbo spooling up.

I checked to make sure that there are no pinched hoses from the intake and everything was reinstalled perfectly. I have a KN cold air kit on the car. I just thought this noise was normal and didn't really think too much about it, but I now worry a bit that something may be choking. Has anybody else experienced this? Does anybody have any suggestions as to what could be making this sound?

I have another un-related question for anybody who has the KN cold air kit installed. On the bottom of the intake tube around the filter end there are two hose outlet grommets. I only have one hose physically connected because I didn't have another to hook up. Is there supposed to be two hoses hooked up to it? What is the second (larger) hose for? Is this a hose used on other R50 models? I currently have the larger grommet plugged up.

Here's a couple of pics of what I'm talking about from the installation guide:

Thanks!


Modified by Pwnin O'Brien at 12:42 PM 7/4/2009 ]]> Pwnin O'Brien 2009-07-03T19:58:40-08:00