I Have a 1988 Mustang GT 5.0, I'm having a bad vaccum problem but do not know which hose is damage. When I first purchase the car I was having this problem and took the car to Ammco and paid 1,300

Asked by Jun 09, 2015 at 01:10 PM about the 1988 Ford Mustang GT Convertible

Question type: Maintenance & Repair

Now the car is doing it again, when I press the brakes the
car idles up and brakes are really hard to push. Also the
car losses pressure and will not drop into second gear.
the transmission is in great shape and jus put in 3 years
ago can anyone help me???

6 Answers

98,565

Sounds like your brake booster took a dump, leaking too much vacuum, it can cause a transmission up/down shift problem. So check all you vacuum hoses, that you can do yourself, look for any cracks, splits or disconnects, if your don't find anything then seek professional help.

I found two lines that was broken but they are plastic, could that have and affect on it?

Tennishoes?

98,565

The small plastic lines usually feed things like the heater controls, emission components, transmission modulator, ect. They can have an effect but are most likely not your real problem.

Best Answer Mark helpful

Is the break booster something hard to get to?

98,565

It is the big cylinderical can that is in the rear of the brake master cylinder, the real problem is getting to the four nuts that hold it on up under the dash, but other than that it not too horrible.

Your Answer

Mustang

Looking for a Used Mustang in your area?

CarGurus has 42,177 nationwide Mustang listings starting at $1,300.

ZIP:

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,540
  • #2
    Bob Beaman
    Reputation
    1,250
  • #3
    COMETGUY61
    Reputation
    1,090
View All

Related Models For Sale

Used Chevrolet Camaro
418 Great Deals out of 31,676 listings starting at $2,395
Used Dodge Charger
417 Great Deals out of 27,620 listings starting at $1,650
Used Chevrolet Corvette
242 Great Deals out of 22,068 listings starting at $2,500
Used Ford F-150
2,116 Great Deals out of 181,536 listings starting at $1,000
Used BMW 3 Series
1,018 Great Deals out of 31,251 listings starting at $1,000
Used Jeep Wrangler
271 Great Deals out of 15,725 listings starting at $2,997
Used Honda Civic
794 Great Deals out of 76,594 listings starting at $888
Used Honda Accord
1,037 Great Deals out of 61,333 listings starting at $999

Used Cars For Sale

2014 Ford Mustang GT Convertible For Sale
60 listings starting at $21,987

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.