Turbo whistle without the turbo

[Joe_M]

When I give my S13 more than 1/4 throttle the engine will give out an ear piercing whistle. &nbsp;I have traced and checked all vaccuum lines, but they are all fine. &nbsp;I have no idea what it could be. &nbsp;I remember someone saying that the EGR tube may develop a hole over time. &nbsp;Could this be it? &nbsp;I am new to Nissans and just need a bit of direction to tackle this problem. &nbsp;I spent the last 4 years wrenching on Honda's so MAF sensors and EGRs and all that are new to me <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> &nbsp;Thanks for any insight.

Joe

[mrdirty]

did u check the exhaust for holes???

[luke91]

Does the car do it in neutral, or only under load?

If it does do it in neutral, put the car on jackstands and have a friend rev it while you look for the source of the wistle. &nbsp;

You'll find it. &nbsp;When you do, let us know what it was.

--luke

[Joe_M]

It's not in the exhaust system per se, I put it up on the lift at my buddies work and the exhaust system didn't have any holes in it.

It will do it in neutral too, so I guess I am going to have to have my buddy stick his head under the hood and look for it. I have been without a set of extra ears for a week since he went to NOPI and is also an engineer with Procter & Gamble so he is out of town alot. Lucky bastard, his new 350z comes in another month. I can't wait for a ride in that!

I will keep you posted.

Joe

[SR20Fastback]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Joe_M @ Sep. 25 2002,7:21)</td></tr><tr><td id="QUOTE">It's not in the exhaust system per se, I put it up on the lift at my buddies work and the exhaust system didn't have any holes in it.

It will do it in neutral too, so I guess I am going to have to have my buddy stick his head under the hood and look for it. I have been without a set of extra ears for a week since he went to NOPI and is also an engineer with Procter & Gamble so he is out of town alot. Lucky bastard, his new 350z comes in another month. I can't wait for a ride in that!

I will keep you posted.

Joe</td></tr></table><span id='postcolor'>
Be careful with the head near the fan &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'> Im not sure what it is if it does it both in neutral and under load... have you checked for codes? Maybe the computer can help you pin point it.

[Joe_M]

The check engine light does not come on. &nbsp;It flashes when the ignition turns over (like normal) but then turns off. &nbsp;I dunno what the deal is with it. &nbsp;I may just have to give up and take it to the dealer. &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sad.gif" border="0" valign="absmiddle" alt=':('>

Joe

[HKrpS13]

I don't know if it's the same sound but my 89 240SX made that sound when I turn the A/C "ON" on a hot day. My friend said it sounds like a BOV.
I think it's something that has to do with the A/C and the air flow.

[kickertu]

is it comming from your engine, or your speakers? if its in your speakers, you have enigne noise, from an amp, or a bad deck.

Just something to think about.

[hurleyboi514]

mine used to do that. &nbsp;it dissappeared, but i dont remember what did it. &nbsp;could have been HKS exaust, AIV valve removed, or the fan being removed.

[Joe_M]

The fan is already removed. &nbsp;Where is the AIV at on an S13? &nbsp;I have the FSM, but it sucks nuts. &nbsp;I can't find anything in there.

Joe

[hurleyboi514]

its on teh drivers side. &nbsp;its got that little black box, thats part of the AIV system. &nbsp;should have a hose goin into the intake box. &nbsp;just yank that whole thing out. &nbsp;you need to get a bolt to fit into the header though to block them. &nbsp;its a wierd size, you can get one at heavythrottle.com.