After I installed stage 2 I hear what sounds like a vacume leak, also my idle has a pulsing sound to it. The RPMs and boost gauge don't move, but the pulsing is very noticable.


I zip tied the vac lines per the Mopar instructions, but the "squeek squeek" whistle at idle is still there. I asked on srtforums and was told to do a boost leak test, and I did and pressure pipes aren't leaking and no obvious leaks from the vac lines that I zip tied BUT there is a small slow hiss comming from somewhere. I don't know if that'd be the vac leak or what, but I have no idea where it's at.

Where else should I look for the vacume leak? I notice when I have the engine running the noise is most noticable on either side of the car, even sitting in the drivers seat with the window down, and slightly less noticable in front of the car. I tried to listen around inside the engine bay and don't hear it, but walk around the car and I do hear it.

The car otherwise runs awesome with no other issues. The noise drives me nuts though just knowing its there. I'd really like to get it taken care of.

I didn't hear it before the stage 2 install, but I did here it right when I started up for the first time after finishing the install.

 

there is a very thick Hose under your intake manifold. It goes all the way to your master C. Also, Check to see if your breaks are working fine, if your breaks seem to be not working correctly, 100% sure your leak is somewhere attached to your master C. or power booster i think they call it. Dont just check the lines for the turbo and IC and TB, check the lines that go to the master c. that is where your boost controller reads boost and vacumm from. Or, you can just make a Leak tester with like 10-20 bucks on parts.

 

I dunno man, my brakes work fine as far as I can tell.

I tried to listen for it again today and it doesn't sound like it's comming from the engine bay. Are there any vac lines running under the car?

I guess I'll drive up on the ramps and crawl under there with it running to see if I can hear anything from underneath.

 

Check all your intercooler piping and behind the turbo. use soap and water and soak up places you think may be leaking. if it bubles, you got a winner.

 

it might be far from it but check your fuel pump, mine crapped out on me after 2 months but when it did it made a hissing like sound and could be heard toward the rear of the car on either side but not the front also when you sit in the car and rev the gas it would actually sound like it was revving as well, like getting louder and whatnot iunno never claimed to be a car guy lol