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

Own this car?

Share your experience with others.
Write a car review

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

Know more, shop wisely

Search

Related Models For Sale

Used Lincoln Town Car
18 Great Deals out of 415 listings starting at $1,050
Used Ford Crown Victoria
5 Great Deals out of 134 listings starting at $3,434
Used Mercury Marauder
8 listings
Used Ford F-150
6,539 Great Deals out of 167,576 listings starting at $1,199
Used Chevrolet Impala
229 Great Deals out of 3,878 listings starting at $1,551
Used Dodge Charger
809 Great Deals out of 14,621 listings starting at $2,999
Used Lexus LS
100 Great Deals out of 1,536 listings starting at $2,300
Used Chevrolet Tahoe
1,302 Great Deals out of 35,053 listings starting at $1,550
Used Cadillac DeVille
263 listings starting at $2,995
Used Lincoln Continental
24 Great Deals out of 492 listings starting at $5,999
Used Ford Mustang
987 Great Deals out of 19,632 listings starting at $1,500
Used Chevrolet Silverado 1500
4,255 Great Deals out of 123,234 listings starting at $1,999
Used Chrysler 300
295 Great Deals out of 5,215 listings starting at $1,995
Used Honda Accord
1,539 Great Deals out of 29,722 listings starting at $1,200
Used Cadillac DTS
21 Great Deals out of 362 listings starting at $2,000

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.