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

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?

5 Answers

61,245

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 out of 1 people think this is helpful.
Best Answer
17,830

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 out of 1 people think this is helpful.
32,355

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)

17,830

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

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Mountaineer

Looking for a Used Mountaineer in your area?

CarGurus has 1,477 nationwide Mountaineer listings starting at $150.

ZIP:

Search Mercury Mountaineer Questions

Mercury Mountaineer Experts

#1 Tom Demyan
Tom Demyan
Reputation 510
#2 kbro
kbro
Reputation 460
#3 FordNut
FordNut
Reputation 310
View All

Related Models For Sale

Used Ford Explorer
936 Great Deals out of 73,995 listings starting at $750
Used Ford Expedition
414 Great Deals out of 24,740 listings starting at $1,999
Used Mercury Mariner
40 Great Deals out of 1,501 listings starting at $800
Used Lincoln Navigator
116 Great Deals out of 5,623 listings starting at $1,299
Used Jeep Grand Cherokee
845 Great Deals out of 68,679 listings starting at $864
Used Chevrolet Tahoe
772 Great Deals out of 28,452 listings starting at $1,500
Used Ford Escape
1,116 Great Deals out of 90,856 listings starting at $1,295
Used Dodge Durango
299 Great Deals out of 24,115 listings starting at $1,500
Used GMC Envoy
51 Great Deals out of 2,393 listings starting at $1,800
Used Honda Pilot
460 Great Deals out of 19,639 listings starting at $599
Used GMC Yukon
518 Great Deals out of 17,126 listings starting at $1,799
Used Ford F-150
2,690 Great Deals out of 212,354 listings starting at $1,000
Used Cadillac Escalade
306 Great Deals out of 10,693 listings starting at $1,900
Used Nissan Pathfinder
410 Great Deals out of 24,817 listings starting at $999
Used Toyota 4Runner
315 Great Deals out of 20,549 listings starting at $2,295

Used Cars For Sale

2010 Mercury Mountaineer Premier For Sale
17 listings starting at $8,400
2009 Mercury Mountaineer Premier For Sale
7 listings starting at $5,990
2006 Mercury Mountaineer Premier For Sale
16 listings starting at $4,000