Question about 2001 Ford Focus

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Jerking Under Acceleration & Radio is effected when this happpen

Hi I have a Ford Focus 2001(Y) 1.6 and am having problems with the car jerking under acceleration. There are no problems when the car is idling or revved when stationary. When the problem occurs and the car goes jerky the radio is also effected and sometime the door warning light will come on then go off after a while. I have read some posts about the mass air flow sensor and problems with acceleration but this seams to be effecting electrical areas of the car as well. I am also hgaving trouble finding the MAF sensor as the layout seems to differ form the 1.8 model i have seen pictures in the haynes manual I have.

Any help would be greatly welcome.

Many thanks

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  • saved_by_the Dec 02, 2008

    My car jerks when it is under acceleration and also when it is idle. My radio is also affected, randomly turning off and on... I think it is an electrical problem but I'm not sure

  • keithRichard Dec 03, 2008

    I have the same car and same problem. some people tell me that it could be the CTM control timer Module, located BEHIND the fuse box by the glove box. will try this weekend and let you know. I also hear woodpecker type moise from behind the steering wheel, which suggests to me that it's a relay flipping on and off in the ENGINE fusebox, try swapping 2 similar relays. On mine the fuel injection is done by relay R7 and i think the Air COn relay is the same - try swapping the 2. Please let me know.

  • keithRichard Dec 03, 2008

    I think to note for future. The back brake light (which doubles as night light NOT the high level brake light) takes a special double filament bulb not the normal P21. By using a normal single filament P21 bulb lots of electrical shorts are created. when i made this mistake, i had radio problems and fuel injection problems - garge changed the backlight and they all went away.

  • Rod087 Mar 15, 2009

    Hi i have the same problem with my 01 focus it is really jerky when just cruising at a steady speed just about in any gear, and the temp guage will drop to zero and jump back up to temp, sometime the idle is rreally high like 2500-3000 when i come to a stop light, can't figure it out.

  • jwall_shadyt May 11, 2010

    is the check engine light on?



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  • Ford Master
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Check the battery ground wire for tight and clean on the engine
check both battery terminals are clean and tight
the problem is from a loose /broken wire that is moving when the engine reacts to load ( engine mount failure )
on some other makes it can be traced to the cam position or crank position wires broken or bare

Posted on Mar 21, 2017


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Posted on Jan 02, 2017

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SOURCE: ford focus 2001

check the switch

Posted on Nov 12, 2008

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SOURCE: 2001 Ford Focus radio code

Sometimes, the radio code is label, in back side of the radio; you need take off the radio for check it. Other times this code is in the last page from owners manual.

If you can't find it, maybe need call to the Ford dealer with your VIN number and they send to you (sometimes need pay for this service).

Hope helped.

Posted on Apr 24, 2010

  • 3018 Answers

SOURCE: black smoke under acceleration that

Black smoke indicates you are running rich. You may have to address the fuel injectors to make sure one is not stuck open. After replacing the MAF censor this would be my next step. Also your turbo seal might be leaking causing your truck to run rich throwing off the o2 censor. Also you can get black smoke from turbo blowby. Not burning oil but actual oil passing the rear turbine seal and getting into the exhaust. This should give you a few good places to check out. Good luck to you.

Posted on Mar 05, 2011

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Just bought a 2015 FOrd FOcus now it is stuttering/jerking upon acceleration but stop after it picks up speed a bit.

You need to have the engine control module scanned for fault codes, I will bet you have a check engine light on and maybe blinking.

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Jerking accelerating

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Jerking problem and engine shuts off while being driven

hi there.
A car that jerks when starting it, when accelerating or whilst you're driving is showing symptoms that something is wrong, though there can be many causes: it can be problems in the starting system, fuel, engine or the exhaust pipe. You may even notice that your car engine light has come on to warn you of a problem. Getting to the problem at the first symptoms can avoid more serious break-downs. In one HOWTO we'd like to give you some advice so you know all the possible reasons and answer your question: why is my car jerking?
  1. Car jerking caused by a blocked catalyst
  2. Jerking caused by a fault in the spark plug
  3. Car jerking because of a drained acceleration cable
  4. Car jerking because of dirty injectors
  5. Car jerking because of the motor winding
  6. Accumulated waste can cause the car to jerk
  7. Car pulling.
  8. Car jerking caused by a blocked catalyst Car jerking can be caused by a blocked catalyst, which leads to gases not being ejected as they should be. The result is that, until the car doesn't rev, the car jerks. If your car has a blocked catalyst you will also notice the following symptoms apart from the jerking.


    • The 'Check engine' light will turn on
    • Your car jerks when accelerating
    • The car's fuel efficiency will have dropped
    For more extended information, take a look at our article on the symptoms of a blocked catalyst. The best you can do if your car is jerking due to a blocked catalyst is to visit a trusted mechanic to fix it.
    Jerking caused by a fault in the spark plug Another cause for jerking can also be a fault in the spark plug or one of its cables. You will know this is the case if your car jerks when you start it in the morning. The symptoms are very similar to a blocked catalyst, but if it's a problem with a spark plug, you'll notice the following too:


    • The engine will make even more noise than it usually does, like that of an airplane.
    • It jerks when accelerating but also when you start the car
    In this case, you can solve the problem yourself by changing the spark plug. If you don't have the skills to change the spark plug yourself make sure a professional solves this problem.
    It is very important to keep the spark plug clean, so you can avoid car jerking and other more problems.
    Car jerking because of a drained acceleration cable A car jerking can also be a result of the acceleration cable being very worn out. You will notice because of the following symptoms apart from the jerking:


    • Your car takes extra time to respond when you press the accelerator and starts jerking.
    • If you take a look inside, you will also notice that the outer covering of the acceleration cable will be damaged.
    The best you can do is change it as soon as possible, as the car will stop at any moment if you leave it to break. Take the vehicle to a mechanic to solve the problem. If your car has this problem, take a look at our article to know all the reasons why your car jerks when accelerating to find out what it may be or try adjusting the acceleration cable if you are handy with cars.
  9. Car jerking because of dirty injectors Another cause for car jerks are dirty injectors. This is not such a serious problem but should know it needs solving too. You will notice your car is jerking for this reason if:


    • Your car also loses power
    • Your engine misfires frequently and jerks and stutters frequently and/or continuously while driving normally.
    It's best to clean them regularly to avoid costly reparations. You can do this yourself using a specific cleaning kit, which are quite cheap and can be found almost everywhere.
    Car jerking because of the motor winding The car's engine/motor winding can be another reason for car jerking. Wear of the engine's winding is most likely caused by the engine being put under stress - i.e. through hard acceleration.


    • If your car has more than one winding and one of them is broken, the car will jerk.
    • In the case there's only one winding, the car will not start.
    The only way of knowing if this is the case is through the use of an Ohm meter, so if you don't own one it's best you check with a mechanic to know if this is the reason your car is jerking.
  10. Accumulated waste can cause the car to jerk Jerking can also mean the fuel filter is blocked because too much waste has accumulated. To make sure this is the case you can learn how to tell if your fuel filter is bad. If this is your case,go to your mechanics to solve the problem or you can also try to clean your fuel filter at home.
    These are the most common causes of a car jerking, however, your car could have another problem that needs the help of a specialist. If you're not sure of what is happening to your car it's better to bring it to a mechanic. The specialist will find the root of the problem.
  11. If you'd like to read similar articles to Why is my Car Jerking - All Possible Reasons, we recommend you browse around our Car Maintenance and Repair category.

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