What's causing my vacuum leak?

5

Asked by Apr 14, 2015 at 12:37 PM about the 2000 Mercury Cougar 2 Dr V6 Hatchback

Question type: Maintenance & Repair

I have a 2000 Mercury cougar  v6.  Whenever the outdoor temperature is below 75
degrees and i go more than 45 mph, a vacuum leak opens up causing a host of issues
(including failure of the vacuum assist breaks), but once the engine warms up, the leak
closes and the car drives fine.  Because it's so sporadic, neither me nor my mechanic can
find the leak. What are the most likely culprits to be causing this?

1 Answer

5

Update: I replaced the IAC which helped a little bit, but didn't eliminate the problem. I have also noticed that the engine will rev ( usually up to 2500 rpm) whenever I use the brakes.

Your Answer

Mercury Cougar Experts

  • #1
    lisagayle
    Reputation
    2,200
  • #2
    Tom Demyan
    Reputation
    790
  • #3
    Jessica Cornelison
    Reputation
    600
View All

Related Models For Sale

Used Ford Mustang
669 Great Deals out of 37,869 listings starting at $895
Used Chevrolet Camaro
400 Great Deals out of 30,708 listings starting at $3,550
Used Chevrolet Corvette
283 Great Deals out of 20,584 listings starting at $2,990
Used Mercury Grand Marquis
38 Great Deals out of 1,747 listings starting at $1,950
Used Pontiac Firebird
10 Great Deals out of 779 listings starting at $4,300
Used Chevrolet Impala
509 Great Deals out of 34,087 listings starting at $950
Used Ford F-150
2,274 Great Deals out of 183,833 listings starting at $699
Used Honda Accord
1,073 Great Deals out of 61,293 listings starting at $1,099
Used Honda Civic
769 Great Deals out of 72,791 listings starting at $1,400
Used Mercury Mountaineer
31 Great Deals out of 1,168 listings starting at $750

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.