nope been trying to figure it out fro months new steering pump new alternator new belts and pulleys thinking maybe a vacuum leak like the other guys are saying maybe the intake manifold gaskets ?
PLEASE HELP!!! I can NOT figure out what this noise is...
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xFuZzYx
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I replaced my stock air intake with a cold air intake and my noise is still there...
after looking at this a couple months later all I can think is "that poor battery", have you considered a two battery system under the hood? you could take a lot of the strain off that battery doing that, as for the annoying sound it may be time to invest in a chassis ear system
https://www.ebay.com/itm/STEELMAN-9...534944&hash=item25c75a71bb:g:BcIAAOSw2fparM67
https://www.ebay.com/itm/STEELMAN-9...534944&hash=item25c75a71bb:g:BcIAAOSw2fparM67
but did you replace intake manifold gaskets
i have a dual battery set up works great
If he had an intake manifold leak that bad' he'd be getting codes and his truck would be running terrible.
well the chassis ears will find it for sure, some auto parts stores may rent them with a refundable deposit
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xFuZzYx
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I will look into what you just suggested, but to answer your question, I have 3 batteries in my Tahoe. And all 3 batteries are sealed agm batteries that are made specifically for car audio and the extreme amperage drain/charge they get from running such loud systems...
1 battery is under the hood:
2 batteries are in the rear cargo area, and they are connected with metal buss bars:
And here are the 8 runs of 0 gauge that go the full length of the vehicle, plus I even have 3 extra grounds that connect to the frame between the front and rear batteries:
xjsc16x
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Have you considered that it could be an air leak somewhere? As in air coming into the cab through a very small hole if the trim around your windshield is not sealing in one tiny spot. You mentioned the light bar so try caulking the holes made for that.
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xFuZzYx
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That is actually a legitimate possibility and I'm kind of pissed now that I never actually thought of that myself...
Because the rubber seal along the edge of the windshield on the passenger side was lifted so the wiring kit for the light bar could be hidden...
Heres a pic of what I mean:
(You can see where the wire goes under the seal at the very top, and where it comes back out at the very bottom.)
That's not an actual seal, it's a removable trim piece. The windshield seals to the body under the edge of the glass. If you open the door and pull up on the rubber piece that goes around the door it comes off of that piece and you'll see the torx screws that hold that piece to the truck. Remove it and route the wires underneath it. Unfortunately it might be deformed by now and you might need a new trim piece. Anyway you can try driving without it in place, maybe tape the wires down temporarily.
sumo
dn ʇǝƃ ʇuɐɔ & llǝɟ ı
Are you sure it’s not electrical feedback? Sounds like it is. Maybe if you drive it, have someone go around and listen to each speaker when it’s happening. You could have a bad ground or even a bad amp. Sometimes it doesn’t matter if the radio is on or not. If you got a bad ground or a short on a speaker wire it gonna play the feed back through the speaker or speakers
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xFuZzYx
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Right now I do get a tiny bit of speaker feedback, and that goes up and down based on the volume, cuts off when I cut the radio off, and does completely cut off because my doors are ran on a 4 channel amp and not straight off of the head unit. But this noise is totally different.
But on a good note, I watched some YouTube videos and I think I have found out what the noise is. I think it is actually the "whistle" caused by my lightbar, but because of how close my lightbar is to my roof, it's way louder than the normal lightbar whistle. But I saw some different videos and the noise matched perfectly.
sumo
dn ʇǝƃ ʇuɐɔ & llǝɟ ı
Well now. That’s something I’m familiar with. Customers complain of wind noise all the time due to aftermarket cross bars and attachments. Put a deflector to change the air flow as see if that’s helps or take the bar off and see if the. Lose stops
yep I mentioned that before I put a deflector on mine and it made it sound like it was pouring down rain, if you had your eyes closed you would swear it was raining it would start as soon as I hit about 50mph, but that was speed related not rpm.
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