car is making a hissing noise

Asked by Mar 20, 2012 at 12:31 PM about the 2005 Ford Mustang V6 Premium

Question type: Maintenance & Repair

once my 2005 (V6) Ford Mustang is started and running, I am hearing a continued hissing noise which
gets worse once the car is driven. I thought it was a belt but not sure. The car's mileage is 42K. Thank
you so much for your advice.

3 Answers

12,735

The problem could be a vacuum leak. If the hissing gets louder when you let off of the gas this would be my guess. Also could be EGR valve. EGR will usually give a check engine light, but not always. The code could come up "EGR" or "Small evap leak". One way to check for vacuum leaks is with starting fluid. If you have a suspect area of a vacuum leak spray just a little starting fluid there. If engine rpm increases you found the leak. With this one be careful not to overdo the starting fluid this stuff is very flammable. Just use very small shots.

1 out of 1 people think this is helpful.
2,875

sounds like a massive vacuum leak

25

check vacuum hoses!

Your Answer

Add photo

Related Questions

  • Car making vibrating noise after releasing the clutch pedal

    I just recently change the clutch and flywheel on my 2013 Ford Mustang 5.0 GT. When I release the clutch pedal it makes a vibrating or turning noise. When I press on the clutch the Noise disappea...

    2013 Ford Mustang GT

    -

    Maintenance & Repair

  • new timing chain put in and still making ticking noise 6 answers

    Just installed new timing chain, rods and lifters. Car still makes ticking noise. Need feedback on what to do I'm at a standstill

    2001 Ford Mustang

    -

    Maintenance & Repair

  • 99 mustang making humming noise when turning 1 answer

    Every time I turn my wheel my car makes a humming noise. I have already replaced my power steering pump but still have this noise. I have gotten use to the noise but it's kind of loud when I pay a...

    1999 Ford Mustang

    -

    Maintenance & Repair

  • A very loud noise when I crank up the car. 2 answers

    I have an 2008 mustang that when I crank it up it makes a really loud noise for the first 5 to 10 minutes of driving. In the colder months it is even louder. Again the noise does disappear once I h...

    2008 Ford Mustang

    -

    Maintenance & Repair

  • Everytime i turn the car hisses at me and the steering feels very stiff 2 answers

    Please people I need help I have a focus st170 04 plate and every time I turn the steering wheel hisses at me and the steering feels very stiff I I'm going fast it feels a little better but it only...

    2004 Ford Focus

    -

    Maintenance & Repair

Mustang

Looking for a Used Mustang in your area?

CarGurus has 47,198 nationwide Mustang listings starting at $1,999.

ZIP:

Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,160
#2 Bob Beaman
Bob Beaman
Reputation 1,200
#3 COMETGUY61
COMETGUY61
Reputation 1,040
View All

Related Models For Sale

Used Dodge Charger
284 Great Deals out of 27,259 listings starting at $2,250
Used Chevrolet Corvette
96 Great Deals out of 20,444 listings starting at $3,495
Used Ford Mustang SVT Cobra
268 listings starting at $6,335
Used Ford F-150
2,257 Great Deals out of 209,069 listings starting at $1,499
Used BMW 3 Series
970 Great Deals out of 33,580 listings starting at $1,000
Used Jeep Wrangler
281 Great Deals out of 18,673 listings starting at $2,995
Used Chevrolet Silverado 1500
1,743 Great Deals out of 169,738 listings starting at $1,800
Used Nissan 350Z
54 Great Deals out of 1,220 listings starting at $3,500
Used Honda Civic
515 Great Deals out of 89,613 listings starting at $1,299
Used BMW M3
42 Great Deals out of 1,711 listings starting at $4,544

Used Cars For Sale

2014 Ford Mustang V6 Premium For Sale
4 Great Deals out of 257 listings starting at $13,179