2006 Mercury Mountaineer - Idles fine. Sputtering/losing power while driving

Asked by Nov 03, 2014 at 08:42 PM about the 2006 Mercury Mountaineer Premier RWD

Question type: Maintenance & Repair

Over the past couple of years I would notice a stutter in the engine while driving.  
Progressively got worse.  That stutter turned into knocking and acting like it would die.  
While not in drive, it idles fine.  Give it gas and it revs fine.  While driving though, I get
the stutter, then the loss of power and have to pull over as it knocks and clunks and
just won't go.  Mechanic replaced fuel pump and filter.  Said he saw a loss of fuel
pressure.  Drove it today, back to the same ol' problem.  Any ideas?  Can the exhaust
system/catalytic converter cause this behavior?  O2 sensor?

6 Answers

75,375

Could be converter stopped up,causing it to flood it self,have it checked,and if that is ok,do a compression check on the engine cylinder,s,

1 people found this helpful.
Best Answer Mark helpful
22,790

Ditto what T_S_T said. Yes the converter if plugged can restrict the exhaust flow to the point it will not run at all.

1 people found this helpful.
38,265

Any CEL's on?

No CELs. Weird. If converter is the issue, wouldn't it do it when idling and reving while not in drive? Any chance it could be some sort of fuel sensor? (since there is loss of fuel pressure noted)

22,790

It could be a combination of things. Fuel pressure regulator comes to mind.

1 people found this helpful.

did you ever figure out what it was. my old oine did it an it was just the spark plugs.

Your Answer:

Mountaineer

Looking for a Used Mountaineer in your area?

CarGurus has 805 nationwide Mountaineer listings starting at $995.

ZIP:

Mercury Mountaineer Experts

  • #1
    Tom Demyan
    Reputation
    620
  • #2
    kbro
    Reputation
    460
  • #3
    tuff4x4
    Reputation
    300
View All

Related Models For Sale

Used Ford Explorer
862 Great Deals out of 67,772 listings starting at $800
Used Mercury Mariner
30 Great Deals out of 928 listings starting at $1,250
Used Ford Expedition
396 Great Deals out of 22,417 listings starting at $1,500
Used Ford Escape
1,022 Great Deals out of 112,117 listings starting at $1,000
Used Chevrolet Tahoe
547 Great Deals out of 38,191 listings starting at $1,243
Used GMC Envoy
34 Great Deals out of 1,560 listings starting at $1,000
Used Chevrolet Equinox
1,039 Great Deals out of 80,421 listings starting at $2,295
Used Dodge Durango
299 Great Deals out of 25,758 listings starting at $1,500
Used Jeep Grand Cherokee
978 Great Deals out of 76,795 listings starting at $900
Used Ford F-150
2,356 Great Deals out of 208,288 listings starting at $998
Used GMC Yukon
328 Great Deals out of 21,474 listings starting at $2,450
Used Lincoln Navigator
72 Great Deals out of 4,226 listings starting at $1,995
Used GMC Acadia
446 Great Deals out of 33,104 listings starting at $1,295
Used Mercury Grand Marquis
22 Great Deals out of 1,233 listings starting at $1,799
Used Lincoln Aviator
183 listings starting at $990

Used Cars For Sale

2010 Mercury Mountaineer Premier RWD For Sale
7 listings starting at $7,995
2006 Mercury Mountaineer Premier RWD For Sale
8 listings starting at $5,990

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.