Question about 2000 Hyundai Sonata

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Hyundai Sonata jerks/loss of power

My car jerks it seems around 2250rpm.Right before it jerks it will make an odd noise like the car cant accelerate. when i am beginning to drive it up a hill it will **** so much that i think it will die. When it does **** the rpm dips suddenly. It has also lost a considerable amount of power. When it does go up a hill it will only go around 20 mph. the problems increase as i drive.
i took it to autozone because it had the check engine light on. So the code said somethin like cylinder misfire. that is a bit obvious... but im not sure what is causing the misfire.

i think the loss of power could be catalytic converter blockage maybe.
and i read somewhere on this website that this car had a broken motor mount that caused a break in the air intake... which caused more air to flow into the engine that the O2 censor measured.

More history: It has had multiple problems and ive had to change the crank shaft censor(4months ago) and fuel pump and fuel filter before(a year ago). My passenger front side of the car shakes a lot because of a broken motor mount. i think may be part of the problem.

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  • zweisamkeit Dec 28, 2008

    it is editing the word jer k. i dont know why. (****) minus the (). sorry for the inconvenience

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Has your car ever had a tune up those little 4 cylinder cars will do that even if 1 cylinder isn't firing properly, so in conclusion what you can do is make sure all your spark plug wires are pushed on all the way since the motor mount is broke they might be coming loose but what i would do is change the spark plugs and wires and fuel filter.. just give it a little tune up if your at all handy you can do it yourself and the parts are cheap you might have 60 bucks into it... if you need anymore help or need me to help you with doing the work just let me know and ill answer all of your questions... Please give me a rating if this helped you
thanks Steve

Posted on Dec 28, 2008

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I also had this problem with my hyundai accent 1.3i i changed the ignition leads and spark plugs the car goes much better now the problem was that one of the plug leads was tracking. hope this helps.

Posted on Jun 26, 2012

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Ok engin mount
this can cause so much trouble and can end up costing you big time
now with the miss fire
you could have loss of spark on an injector could be blocked
for spark
distributor
spark plugs
leads
rotor button (sits in distributor )

with fuel
just gets some injector cleaner and see if that works

for your sake i would fix the mount
it could be causing all the problems
hope this helps
ricko


Posted on Dec 28, 2008

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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?
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  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
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  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.

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    • 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.
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    • 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
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    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:

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    • 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.
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    • Your engine misfires frequently and jerks and stutters frequently and/or continuously while driving normally.
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  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.
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