1997 grand marquis

Asked by Dec 07, 2017 at 08:07 PM about the 1997 Mercury Grand Marquis

Question type: General

When I'm driving my car down the highway going 65 mph and
it drops speed and my foot is still on the gas and it slows
down do it got something to do with the air flow sensor are
mass sensor

6 Answers

Idk

127,715

Good question, could also be excessive exhaust back pressure, fuel supply limited due to a bad pump or plugged fuel filter, O2 sensors not responding correctly as well as any number of sensor problems, grounding issues, etc. I think the first thing to check would be the fuel pressure and flow, then the exhaust back pressure, if it's still acting up then a live data scan should locate the problem.

1 people found this helpful.

Where can I find that at under the hood

127,715

There is a test port towards the rear of the engine on the fuel rail. You can purchase a DIY kit at your local parts store for the exhaust test.

Ok appreciate it man I know I'ma be spending bout 700 to 800 dollars

127,715

At least that, if you find you need parts try aftermarket first, it could save you some money.

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 7 nationwide Grand Marquis listings and the tools to find you a great deal.

Postal Code:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    6,320
  • #2
    Js08016
    Reputation
    2,310
  • #3
    kbro
    Reputation
    2,280
View All

Related Models For Sale

Used Lincoln Town Car
13 listings starting at $6,995
Used Chevrolet Impala
20 Great Deals out of 957 listings starting at $1,950
Used Ford F-150
129 Great Deals out of 12,617 listings starting at $3,895
Used Lincoln Continental
38 listings starting at $42,997
Used Ford Taurus
9 Great Deals out of 347 listings starting at $4,995
Used Ford Mustang
46 Great Deals out of 1,594 listings starting at $2,400
Used Chevrolet Tahoe
11 Great Deals out of 1,011 listings starting at $4,999
Used Cadillac DeVille
21 listings

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.