Question about 2001 Hyundai Sonata

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01 sonata all sensors, coils, plugs,mass air flow have been changed.car runs well on highway. but, locally not so good. having problems when re-excelerating after coming to a stop. press gas pedal down but car goes no where. there is a second or two of lag time before car will pick up, hesitating at times of pressing gas pedal, but not occuring at highway speeds. engine computer is in good shape as well.mechanic cant figure out why the car will not pick up instanly after driving a bit then stopping at a light or stop sign, even though gas pedal is been pressed down, also when i am doing that, i have no reving or rpm action on dash board please help, thanks vinny 917-841-2079

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Hi! As a first course of action I strongly suggest that you replace the plug wires. The plug wires may be faulty causing less current flow to the spark plugs. You may want to adjust the distributor to find the right timing. Hope this helps and thank you for using FixYa!

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

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Low or no power, changed the mass air flow sensor? OBD showed a problem on left side cat converter? Runs good one day and bad the next. Problem started after hurricane. Acts like exhaust is plugged ...


If its showing a catalytic converter code,,dont keep replacing other sensors..Has nothing at all to do with the map or the mass air flow sensor...Likely its the cat is clogged..That code tells you that your cat is not doing its job..I would change that cat on that side,,and quit letting the mechanic throw parts on the car..Thats to expensive

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1 Answer

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Possible Causes:
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1 Answer

I have a 2000 Hyundai sonata 2.4L 4 cyl.. When I run it on the highway for say about 20-25 minutes, when I get off and come to a stop the RPM's drop to 4 or 5 hundred and the car shakes/sputter hard from a...


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2 Answers

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1 Answer

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2 Answers

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you may have a bad coil---take a pair of rubber handle plyers & remove the spark plug wires 1 at a time---when you pull off a plug wire you should notic the truck runs even worse---the one you pull off & it doesnt change the way it runs--that is the cylinder that has the problem

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