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Crd really loud now?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=91900		 Page 1 of 1
Author:  Chuci [ Sat Mar 20, 2021 7:21 pm ]
Post subject:  Crd really loud now?
After working on my car figuring out why I had low boost I took off my turbo and after installation it is really loud almost like a chopper? Any ideas what it could be?
Author:  Chuci [ Sat Mar 20, 2021 7:41 pm ]
Post subject:  Crd really loud now?
Since you can’t add videos here I just decided to upload it to YouTube for you all to see
https://youtube.com/shorts/-Jyjyfc04sA
Author:  Chuci [ Sat Mar 20, 2021 8:22 pm ]
Post subject:  Re: Crd really loud now?
Chuci wrote:
Since you can’t add videos here I just decided to upload it to YouTube for you all to see
https://youtube.com/shorts/-Jyjyfc04sA
Also I changed out the turbo and I still have low boost. No idea what it could be
Author:  WWDiesel [ Sat Mar 20, 2021 9:38 pm ]
Post subject:  Re: Crd really loud now?
Chuci wrote:
Chuci wrote:
Since you can’t add videos here I just decided to upload it to YouTube for you all to see
https://youtube.com/shorts/-Jyjyfc04sA
Also I changed out the turbo and I still have low boost. No idea what it could be

Sounds to me like you might have an exhaust leak?
Author:  foxmiles [ Sun Mar 21, 2021 9:55 am ]
Post subject:  Re: Crd really loud now?
Check your vacuum hoses / entire vacuum system, make sure the turbo solenoids are getting vacuum, plugged in, and working properly.

I just swapped out my turbo in my never ending quest to get rid of the lag at takeoff. Seems a lot better, but somehow I managed to pinch the vacuum hose going to the actuator. It worked good for 2 trips, then I headed home and she suddenly seemed significantly louder and lost power. (turbo "defaults" to wide open vanes, so little or no boost. Upside is it's still drivable and you won't damage anything) New vacuum line and she's happy again!

I'd consider that likely since you have low boost and a loud exhaust. Other options for low boost are blown boost hoses, bad map sensor, bad vacuum solenoid, bad vacuum modulator, vacuum leaks, etc. Loud exhaust could also be a bad flex connector at the bottom of the turbo down pipe.

Wait... You're the guy with no brake boost aren't you? and these have vacuum assisted brakes? and a vacuum actuated turbo? Yea, you need to fix your vacuum system before you mess with anything else...

Good luck man!
Author:  WWDiesel [ Sun Mar 21, 2021 11:49 am ]
Post subject:  Re: Crd really loud now?
Chuci wrote:
Also I changed out the turbo and I still have low boost. No idea what it could be

Where are you/vehicle located?
Your need to add your location to your signature so people will know where you are located.
You can update your signature by clicking on the "User Control Panel" button/link in the upper right hand corner.
Then on the left, click on "Profile", then "Signature" and add all your information including "Location".
Need help, just ask! :wink:

Knowing where you are located, there may be a member on here local to you that can help take a look at it for you? :D
Author:  Chuci [ Sun Mar 21, 2021 1:43 pm ]
Post subject:  Re: Crd really loud now?
WWDiesel wrote:
Chuci wrote:
Also I changed out the turbo and I still have low boost. No idea what it could be

Where are you/vehicle located?
Your need to add your location to your signature so people will know where you are located.
You can update your signature by clicking on the "User Control Panel" button/link in the upper right hand corner.
Then on the left, click on "Profile", then "Signature" and add all your information including "Location".
Need help, just ask! :wink:

Knowing where you are located, there may be a member on here local to you that can help take a look at it for you? :D
I have updated my signature.
It’s funny that you say about another lost crd member. I’ve only seen one other crd since I’ve had my car and its really exciting.
Author:  Chuci [ Sun Mar 21, 2021 1:49 pm ]
Post subject:  Re: Crd really loud now?
foxmiles wrote:
Check your vacuum hoses / entire vacuum system, make sure the turbo solenoids are getting vacuum, plugged in, and working properly.

I just swapped out my turbo in my never ending quest to get rid of the lag at takeoff. Seems a lot better, but somehow I managed to pinch the vacuum hose going to the actuator. It worked good for 2 trips, then I headed home and she suddenly seemed significantly louder and lost power. (turbo "defaults" to wide open vanes, so little or no boost. Upside is it's still drivable and you won't damage anything) New vacuum line and she's happy again!

I'd consider that likely since you have low boost and a loud exhaust. Other options for low boost are blown boost hoses, bad map sensor, bad vacuum solenoid, bad vacuum modulator, vacuum leaks, etc. Loud exhaust could also be a bad flex connector at the bottom of the turbo down pipe.

Wait... You're the guy with no brake boost aren't you? and these have vacuum assisted brakes? and a vacuum actuated turbo? Yea, you need to fix your vacuum system before you mess with anything else...

Good luck man!
I agree with fixing my vacuum system. Is there any way to check to see if I am getting vacuum? I’ve kinda just been unplugging a hose and check to see if it would suck on my finger.


Sent from my iPhone using Tapatalk
Author:  Billybob [ Sun Mar 21, 2021 2:11 pm ]
Post subject:  Re: Crd really loud now?
foxmiles wrote:

Wait... You're the guy with no brake boost aren't you? and these have vacuum assisted brakes? and a vacuum actuated turbo? Yea, you need to fix your vacuum system before you mess with anything else...

Good luck man!


This^^^^ :roll:
Author:  foxmiles [ Sun Mar 21, 2021 11:04 pm ]
Post subject:  Re: Crd really loud now?
Chuci wrote:
I agree with fixing my vacuum system. Is there any way to check to see if I am getting vacuum? I’ve kinda just been unplugging a hose and check to see if it would suck on my finger


Yea, probably the best way is to see if you can find a vacuum gauge kit, should be around $20 (Amazon has one for 17.50) it will have a rubber hose and some little nozzles you can stick in tubes to measure it. It's a bit of fiddling, but not hard. Also these jeeps aren't terribly complicated on the vacuum side. I saw you had issues with the vacuum line where it connects to the dash, I'd start with testing it right there, or even just blocking that port off (thus reducing the vacuum system to "only under the hood")

It's just a process of elimination. Make sure you have vacuum in that big line going to the brake booster (if not the vacuum pump or the hose to it has failed), then make sure you have vacuum at the little line coming out of the brake booster (if the pump is working and there's not enough vacuum there it's likely the seals in the brake booster have failed or something is jammed with the pedal or something weird like that?). If both of those check out (it actually may be easiest to do it backwards, check the little hose first, then take the big one out if it doesn't build vacuum), block the little line and you should have brakes again. Work your way though the system and see if you can locate a failure. I'd block off the tee to the dash stuff while I was testing it, get the under hood stuff fixed first. I think you should see around 25inhg on your vacuum gauge. (might vary a bit, but I don't think less than 20 is ok) Note that after the turbo modulator valve it will be lower, that's normal.

I'll look at mine tomorrow as I'm not 100% sure how everything is routed, but we should be able to figure this out pretty easily.
Author:  WWDiesel [ Sun Mar 21, 2021 11:42 pm ]
Post subject:  Re: Crd really loud now?
This is the OEM vacuum hose routing:

Image
Author:  Chuci [ Mon Mar 22, 2021 2:01 am ]
Post subject:  Re: Crd really loud now?
Image
Is it something like This?
Author:  foxmiles [ Mon Mar 22, 2021 10:30 am ]
Post subject:  Re: Crd really loud now?
That's the thing!
Author:  Chuci [ Mon Mar 22, 2021 12:40 pm ]
Post subject:  Re: Crd really loud now?
foxmiles wrote:
That's the thing!
Alright, thank you!
Author:  Chuci [ Tue Mar 23, 2021 1:50 pm ]
Post subject:  Re: Crd really loud now?
Ok I just used the vacuum tester and I wasn’t getting any vacuum at all. Then i remembered about the open hole that is supposed to go into the cabin. I covered that up with my finger and u started getting vacuum. Also after I plugged it with my finger, the vacuum modulator valve started buzzing like how it used to when It worked.
Author:  Chuci [ Tue Mar 23, 2021 3:10 pm ]
Post subject:  Re: Crd really loud now?
Image
This is the line I was referring to. The one I was plugging up with my finger
Author:  WWDiesel [ Tue Mar 23, 2021 5:56 pm ]
Post subject:  Re: Crd really loud now?
Chuci wrote:
This is the line I was referring to. The one I was plugging up with my finger

That looks to be the "TEE" where the HVAC vacuum tube would normally be connected.
That hose/pipe also feeds the turbo vane controls.
You should plug that "TEE" with a small bolt until you find the HVAC vacuum tube pipe to connect to it.

The "Vacuum Supply to HVAC Controls in Dash" in this drawing:
Image
Author:  Chuci [ Thu Mar 25, 2021 6:39 am ]
Post subject:  Re: Crd really loud now?
I had an echaste leak coming out of the echaste clamp and as for my turbo and my vacuum system. I plugged up the whole and everything it working great. Thanks everyone.
Author:  foxmiles [ Thu Mar 25, 2021 10:11 am ]
Post subject:  Re: Crd really loud now?
Awesome! Glad it was just that, too bad it probably means pulling the dash again to get the vacuum line to the HVAC controls back out where it should be... you can try to fish it with it in, but I don't think there's enough access. If you can find the line you might be able to get some silicone hose and route it differently too.
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