99 grand marquis 197,000 milesruns only with maf disconnected

Asked by GuruXZ6VN Oct 04, 2018 at 06:30 PM about the Mercury Grand Marquis

Question type: Maintenance & Repair

starts and stalls after 2-3 seconds,disconnect maf , starts easily and idles .try
to accelerate and it cuts out.sometimes it will run with maf connected if its
warmed up . maf return from pcm has .03 volts with key on . cleaned
grounds on both sides of engine compartment have continuity from pcm to
maf .installed new maf [not reman]. reman programmed pcm,newpigtail on
maf.preformed wiggle test on wires.recent new fuel pump module,35psi,40
with regulator vacuum disconnected.whats next?

2 Answers
40,005

beatupchevy answered 6 years ago

clean the throttle body with carb. cleaner and a toothbrush on the throttle plate , look for any loose/broken vacuum lines

Mark helpful
159,045

Bob answered 6 years ago

A mechanic cause throwing parts at it will be expensive.

Mark helpful

Your Answer:

Related Questions

  • 99 grand marquis 197,000 milesruns only with maf disconnected 2 Answers

    starts and stalls after 2-3 seconds,disconnect maf , starts easily and idles .try to accelerate and it cuts out.sometimes it will run with maf connected if its warmed up . maf return from pcm has .0...

    Mercury Grand Marquis

    -

    Maintenance & Repair

  • 99 grand Marquis 1 Answer

    We are having to carry 2 batteries with us where ever we go. One to get there one to get home. No further then 40 miles either way. We put new alternator on about 4 months. Ago but never helped. C...

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • 99 Mercury Grand Marquis 2 Answers

    So I've had a a 99 Mercury Marquis sitting in my garage for about 2 years, I've been trying to get it to run lately. So I've changed the fuel pump, cleaned out the tank and put it back on and I got...

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • 99 grand marquis problems with battery draining when messing with my radio 2 Answers

    I had just bought a jvc head unit withat the adapters for my make model and year car. My car had ran perfectly and everything but when I had taken my radio out my horn, my interior lights, the re...

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • 99 Grand Marquis won't stay started 2 Answers

    99 Grand Marquis starts after a minute or two will run and then all the sudden it stalls like it's out of gas and it stops wait a few minutes and it'll start again what can it be

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,850
  • #2
    Trippmeister
    Reputation
    5,140
  • #3
    Bob Beaman
    Reputation
    3,880
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
8 listings
Used Ford Crown Victoria
5 listings starting at $8,000
Used Chevrolet Impala
14 Great Deals out of 117 listings starting at $3,531
Used Ford F-150
327 Great Deals out of 15,257 listings starting at $3,295
Used Lexus LS
3 Great Deals out of 28 listings starting at $7,900
Used Ford Mustang
46 Great Deals out of 1,263 listings starting at $4,995
Used Honda Accord
44 Great Deals out of 919 listings starting at $2,799
Used Cadillac DeVille
7 listings
Used Chevrolet Tahoe
15 Great Deals out of 853 listings starting at $5,995
Used Lincoln Continental
4 Great Deals out of 11 listings starting at $17,900
Used Cadillac DTS
12 listings starting at $7,999
Used Chrysler 300
43 Great Deals out of 505 listings starting at $4,999
Used Dodge Charger
36 Great Deals out of 630 listings starting at $4,888
Used Chevrolet Camaro
22 Great Deals out of 321 listings starting at $10,500

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.