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Old 06-26-2009, 08:44 PM
Oh Randi's Avatar
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Car: 2001 1.8T, 5spd
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Default Weird sound when hitting the gas..?

The only way I can think to describe it is when you accelerate, it sounds like you're letting air out of a balloon for a second or less. As some of you may know, a vacuum hose came undone yesterday. Took it up to my BF's work and one of his coworkers came out and looked at it for me. I saw a small hose just chillin' there and I was like, "Um... is this supposed to be connected to something?"

I can't remember what he called it, something shaped like a T? Well, we fixed it and I got back some of the power I lost. Don't know how long its been like that. But it didn't get rid of the original problem. It still makes that balloon noise when accelerating. I'm going to try and get a sound clip of it. At an idle, you can hear it faintly hissing, and you can hear it better if you bend down and listen by the front driver's side wheel. The coworker suggested an intake leak of some sort?

Is it okay to drive for the next week and/or is it an easy (and cheap) fix?

Did I mention I am SO READY to get the new motor put in next week?!! I'm so tired of the constant problems.



//edit:

Another thing its still doing:

After you rev it, it drops down below normal RPMs and struggles for a bit, goes up to normal, drops again, and repeats the process 3 or 4 times before idling normal. I need help! Is it driveable?
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Last edited by Oh Randi; 06-26-2009 at 09:39 PM..
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Old 06-27-2009, 12:55 AM
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I believe he is pissed about the being traded for a Taurus comment. Did you show him the new engine he is getting?

What you are hearing certainly sounds like a vacumn leak of some sort. The idle sounds like an old vacumn advance problem. The ECU may read vacumn from somewhere and is trying to adjust accordingly. Nor or someone can probably give you the definitive on that.

If the hoses are good then check the hard plastic pieces where they connect they can also crack, sounds like that is what the t-fitting was.

These can be hard to find so you might want to try this trick. Get a jar, glass or whatever and mix some dish soap and water in it. Then take a rag or sponge, actually those lip sponge things like they use in the hospital or a small sponge paint brush work well.

While the car is idling start spreading that mixture on the hoses. You should see some bubbles when you go over the leak.
Don't go crazy with the mixture as you don't want a bunch of that stuff getting sucked into the hose.

The other thing if you can borrow one, is get a mechanics stethoscope (pretty much like a doctor's and start listening for the leak). The stethoscope really focuses your hearing making it easier to locate the leak exactly.

As far as the boost goes have you checked the pressure switch on the bottom of the intercooler?

ps-on the soapy water deal, tire places have a trough that they will submerge tires in when they are having trouble finding a leak. If you have a pool get a bunch of friends to line up in a 'U' shape and then drive your car into the pool. Someone should be able to spot the bubbles fairly easily.
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Old 06-27-2009, 03:18 PM
Oh Randi's Avatar
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Quote:
Originally Posted by 99Turbo View Post

As far as the boost goes have you checked the pressure switch on the bottom of the intercooler?

ps-on the soapy water deal, tire places have a trough that they will submerge tires in when they are having trouble finding a leak. If you have a pool get a bunch of friends to line up in a 'U' shape and then drive your car into the pool. Someone should be able to spot the bubbles fairly easily.
No, how do I do that?

and.

Excellent idea! We just finished installing a friend of mine's pool! But how to get the car in the deck?
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Old 06-27-2009, 06:58 PM
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Intercooler is mounted to the outside of the passenger side fog light. Right in front of the fender liner.

Switch is on the bottom, held in by two screws, just make sure they are tight and the seal is good. Also check that the connector is tight, although I would think if that was loose you would get a code.

As far as the other thing big ramp maybe?
Don't forget to video it as you will surely be a star on utube
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