Question about 2007 Mercury Mariner Premier 4WD

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I have a 2007 mercury mountaineer, it jerks when accelerating, what does that mean?

When I accelerate my car jerks, like it's shifting hard or something

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 69 Answers

SOURCE: Car stalling under acceleration

bad fuel pump it i about to go out but hasnt gone completely out yet

Posted on Oct 06, 2008

  • 77 Answers

SOURCE: upon acceleration the car jerks then smooths out

Check engine light on? Most problem is spark plug wire breaking down. Replace spark plugs and wires.

Posted on Apr 29, 2009

  • 5480 Answers

SOURCE: Jerking on normal acceleration.

You might try a TPS switch. It should set a code but yours did't. The throttle position sensor sets the spark advance and fuel flow to match. The other possibility is the EGR system which also should set a code.
If you have not changed the fuel filter,try that because if you accellerate hard the fuel slooshes to the back of the tank.
In normal driving the contaminents lay on the bottom of the tank.

Posted on Aug 18, 2009

  • 5480 Answers

SOURCE: 2000 mercury cougar hesitating/jerking

First, disconnect neg battery cable 10 minutes and reattach to clear codes.
Lean condition means it is not getting same fuel as other side of engine.
Since you had it scanned before, try Autozone to see if new results.
You might try a TPS switch which regulates spark and fuel feed. At lower speeds EGR starts to open-you should have code for a problem there.

Posted on Aug 18, 2009

wracefans24
  • 1985 Answers

SOURCE: I have a 2004 Mercury Mountaineer. Sometimes when

you probably should change the transmission fluid and filter with that many miles on it.

Posted on Jan 02, 2010

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1 Answer

Why car wont pick up speed when i get to 40mph then jerks and pick up speed


Does it down shift appropriately when accelerating? Normally when you stomp on the gas while in a high gear (travelling at 40mph), the transmission will downshift to a lower gear giving the car much more torque. This can cause the car to jolt or jerk forward and accelerate suddenly.



If this is way off base and you\'re experiencing something else, please let me know

Jul 25, 2014 | 2006 Buick Lucerne

1 Answer

Jerking accelerating


This may be normal but you can adjust your driving to reduce the impact. To speed up the warm up process of the catalytic converters, the power train computer holds first gear a little longer than normal. This causes your car to get higher in the rpm range than normal, at part throttle, which causes the hard shift. On your first drive, try NOT to accelerate while the car is in first gear--it won't take long for you to learn how far this is.

Apr 22, 2014 | Mercedes-Benz E-Class Cars & Trucks

2 Answers

Car jerks hard taking off


Since you\'re old school I would think you\'ve already checked the normal stuff like the fluid level in the transmission. If this is good, has the transmission ever been serviced? I\'m not familiar with your vehicle so if it has a filter it could be that is partially clogged, Does the fluid have a strong smell to it? Does is feel absolutely smooth or can you feel or see little flecks of something in it. You may solve this by dropping the pan and replacing the filter. But if that is the problem it will only be temporary as if there is debris in the pan you are ready for a rebuild.The sooner you do it, the better before you have hard part damage. Another possibility is a bad solenoid in the tramsission that isn\'t sensing the pressure until it is high enough to jerk when it kicks into gear. Again to even check this though you need a transmission guy to pull it and look it over. Sorry guy.

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1 Answer

Hards shifts when accelerating


have some one check your trasnmission could be a low fluid or something else

Jan 30, 2014 | 1994 Nissan Altima

1 Answer

1996 camaro it's a v6- standard. The car has 79k


EGR Valve?
TPS Sensor?
Vacuum Leaks

You know it is a throttle actuated issue

May 23, 2012 | 1996 Chevrolet Camaro

1 Answer

My 1994 ford thunderbird check engine light is on and the engine jerks when accelerating


That "****" could be a hard shift. There were problems with the transmissions around these years, and they would occasionally downshift, causing the RPM's to shoot up without you noticing, thus a hard shift. I have the same car and the issue can be fixed by replacing the two speed sensors on the transmission. They are easily replaced alone and don't require dropping the transmission or draining the fluid. They can also be easily attained at your local Napa or O'Reily's for $20 each.

May 15, 2012 | 1994 Ford Thunderbird

1 Answer

Shifts hard and jerks under hard acceleration.


thottle positioning sensor? if trans has overdrive could be a lock up piece, dont remember name of it. there is a lucas oil product that might help. if it is the overdrive.

Nov 05, 2009 | 1994 Ford Taurus

1 Answer

97 yukon 4wd. Jerks and makes noise like its


Hi amberdawn_84

My 97 yukon did the same thing (I believe). The valve body in the transmisson wears out (design problem) and causes the transmission to shift really hard. My repair was about $500 (nondealer).
LOVE MY YUKON!

Apr 23, 2009 | 1997 GMC Yukon

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