I noticed a hissing noise coming from under the dash

Asked by Bodie13 Aug 28, 2014 at 07:23 PM about the 1999 Toyota Camry Solara 2 Dr SLE V6 Coupe

Question type: Maintenance & Repair

I noticed a hissing noise coming from under the dash while driving.  I turned off air and
radio and noticed it was only when I pressed the brake pedal (didn't matter if I was
stopped or moving).  When the car is stopped and its *Really* quiet I can hear it when I
am not pressing my brakes.  I know this sounds like a booster issue but here is the catch:  
My brakes are perfectly normal and have been for a week since this has happened.  The
mechanic I spoke with does not believe its the booster, and I hope it isn't because I don't
have that money.  The car is a 1999 Toyota Solara V6 SLE

11 Answers

63,145

Hmmmm. How dose the rubber hose from the block to the brake booster look?

1 people found this helpful.

BoholMark, It's as old as the car is. I tried running my hands up and down the hose to detect leaks but I couldn't find anything (granted there is a much more methodical way to do this). I suspect it could also be a the check valve. When I am in my car its easy to hear, left side under dash. But when I get under the hood, it is hard to pin-point the location of the noise with all the other moving parts creating noise.

Mark, Yeah. Brake pedal gets pretty much hard when the car cuts off. Once car turns on, it operates normally and drops a couple inches.

He gave an opinion. He said he'd worked on Toyota for 20 years and has only ever had to replace a few boosters and said he very highly doubted it given my symptoms.

63,145

All the symptoms are there. Hissing noise. The brake peddle gets hard. There's a vacuum leak somewhere.

2 people found this helpful.
Best Answer Mark helpful

I completely agree but I've read through so many posts that talk about bad boosters and I just struggle to think that's my issue... I have no trouble braking, no trouble idling, etc. It sounds like someone is going to have to take a look to diagnose... Thanks for your help!

10

I have the exact same problem on the same model/year car. Although the brakes seem to work normally, on a panic stop you can tell they are not providing enough braking power. At 40MPH and standing on the brake with both feet, ABS never engages and stopping distance too long. I took this to Toyota, and they did a full diagnostic on the brake system, including vacuum check of the brake booster. They found no problems. Funny thing is, the problem disappeared for a few weeks. No noise, and panic braking performance was restored, with ABS functioning as expected. But now it has returned. I am at a loss.

1 people found this helpful.
10

With the car running you can pinch off the brake booster hose and stop the vacuum to the booster. If the nose stops it is a booster it may be in the early stages of failure with a small pin hole in the diaphram.

1 people found this helpful.

I dont think it is the vacuum line going to the booster because your car would have had a rough idle.

Your Answer:

Camry Solara

Looking for a Used Camry Solara in your area?

CarGurus has 20 nationwide Camry Solara listings starting at $3,995.

Postal Code:

CarGurus Experts

  • #1
    FXX_7851
    Reputation
    770
  • #2
    Mike Bonnell
    Reputation
    630
  • #3
    Jasondsmith83
    Reputation
    540
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Toyota Camry
52 Great Deals out of 985 listings starting at $2,212
Used Toyota Corolla
108 Great Deals out of 2,035 listings starting at $2,795
Used Toyota RAV4
108 Great Deals out of 2,083 listings starting at $3,888
Used Toyota Avalon
4 Great Deals out of 27 listings starting at $4,988
Used Honda Civic
180 Great Deals out of 3,705 listings starting at $1,995
Used Honda Accord
40 Great Deals out of 910 listings starting at $1,599
Used Lexus ES
15 Great Deals out of 195 listings starting at $3,888
Used Lexus RX
39 Great Deals out of 845 listings starting at $3,995
Used Honda CR-V
103 Great Deals out of 3,896 listings starting at $1,795
Used Toyota Tacoma
55 Great Deals out of 1,071 listings starting at $8,708
Used Ford Mustang
65 Great Deals out of 1,259 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.