73240z

thanks for your help, I might set up the catch can and re-route it, good idea. Thanks, John

Mick, If you don't have a scan tool to check codes, drop by autozone and rent their scan tool. I take advantage of their rental tools all the time. Get the code reader, hook it up to your OBDII port (if you have one) and it will tell you if you have any problem codes. Your still not getting fuel to the cylinders, right? Good luck, John

Good news, I fixed the problem! I think what I did is ok, let me know if it isn't. I disconnected the hose from the intake and plugged that hole (on the passenger side), and I put a breather/catch can on the valve cover side of the hose, runs the same and no whistle! Thanks for the help guys, and if there is a problem with what I did, please let me know because I really don't want to harm the engine. Thanks again, John

yea, I think I might try putting a little filter on the valve cover side, and completely block off the intake side. I think that will be ok, and it should stop the whistle. John

Oh yea, and I tried the carb cleaner with no luck, I sprayed everywhere with no rpm rise... except when I did it on my air filter...

Alright guys, I figured out how to eliminate the whistle noise, but I was wondering if what I'm doing to stop the whistle is bad for the engine. I figured out that if I squeeze shut the vacuum hose that runs between the intake (just behind the throttle body on the passenger side) and the passenger side valve cover, the whistle goes away and it continues to run fine. Is this bad for the engine to block off those ports? What does that hose usually do? other than make my car whistle! So, the question is, will it do any harm if I eliminate the hose? Input very much appreciated, Thanks, John

is the engine firing? Or is it just cranking over?

yea, actually I'm down here in san diego, but the car is up in redlands area. I go to school down here, and work on the car up there. I go up there every week or so and will soon be out of school so I'll be up there more. Hope to put some mufflers on the car and bring it down here for some qualcom autox's. I'll let you know when I bring it down here. Thanks for the offer, but hopefully I can fix it before I bring it down here. John

thats not a bad idea, I will mess around with that a little. I'm willing to try anything at this point. Someone suggested using a stethoscope, but I'm not sure if that loud help cause the noise seems to be reverberating throughout the whole engine bay. Thanks, John

no a/c, no power steering, no smog. The whistle continues even after the car is turned off just for a couple seconds. I don't think its the fuel reg., although thats a good guess. I've had more than one problem with my fuel reg already. Its so loud, that its hard to pinpoint the location. I will try looking it over again. John

haha, I wish, then I would have an excuse to tell people what the noise is. "My super charger is so big you can hear it whistling from 2 blocks away!" Nop, naturally aspirated. I thought that could be the possible problem and I tried blocking it off already, but it didn't effect the whistle. I will try to get some sound for video clips up and post them. Thanks for the help, John

no, I don't think it can be a head gasket because when I give it throttle the whistle goes away, then back at idle it will whistle again. when it dies out below idle, it goes away, and when I turn the car off, it will continue (after the belts have already stopped) to whistle as it rises in pitch for just a couple seconds.

still stuck, no ideas?

Alright, I have searched this issue and found good information pertaining to the TB whistling problem, but I do not think that is my issue. I believe the whistle is coming for somewhere else around the intake system. Here's my problem: On a cold engine, there will be no whistle what so ever. It is only until the engine warms up a little that it spontaneously just starts to whistle very loudly. This whistling only happens at idle or very little throttle. The whistle is so loud that you can hear it from about a block away, and my car is also running straight pipes. So you kind of get the idea of how embarrassing it is to drive around with this problem. Another thing is that once I turn the engine off, and the belts stop, the whistle will continue for about a second, they very vacuum-like, die out and raise in pitch over the next 2 seconds. I thought it was my TB, so I took off my intake elbow and while the car was running I put my fingers around the edges of the blade, and tried closing off all the separate holes inside where air was being sucked in and none of this effected the whistle in any way (except making the car slightly die out). I listened as best I could, but I could not locate exactly where its coming from... at times its sounds like in the front of the engine, and other times seems like its coming from the back of the engine. Its a newly rebuilt LS1 and I only have about 200 miles on it. Its been doing this ever since I got it running properly. I just can't figure out what would cause the whistle only once at operating temperature and only when its at idle, or barely open throttle. Please guys, any help is very much appreciated. Any suggestions? Thanks, John

check your rule books. not for scca, but not sure about drag race cages, if your using it as a drag car, you might want to look into it. For nasa, scca, and other organizations I don't believe requires it. Want to double check though, don't take my word for it.