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Discussion Starter · #1 ·
Hi there !

First: Thanks much for all the info provided on this site; very helpfull most of the time :thumbsup:

At this point, i'm desperate to find a solution as this is very annoying and i'm thinking about selling it shortly...

First, it's a Sonata 2008 2,4 manual with 60 000km on the clock. I bought it used at a fair price few months ago and should say that overall, i'm pretty satisfied. BUT, two little annoyments became a PITA on a daily use: 1) the clutch - wired accelerator design that gives a little bump each time i shift from 1st to 2nd to 3rd, if i'm not fully focused on the friction point vs accelerator position. 2) At low RPM, low speed, from 1st gear - shifting to 2nd gear until i'm in 3rd gear, i have this slight hesitation in the acceleration ( feels like fuel or spark is missing at a random pace ). It's VERY annoying as i can not have a smooth and linear acceleration 99% of the time.

I went to my Hyundai dealer and explained the problem. They confirmed my problem with a road test and tried to figure out what is causing this behavior. Got a complete scan to see if something went wrong. They changed the fuel filter ( was due anyway per maintenance sked), got rid of the fuel in the tank and replaced it. Got new spark plugs, air filter. Did another road test and ............... did it again :puzzled:

As it's only a "slight" hesitation, there's nothing more they can do !

I got rid of the resonator, from the air intake and it's still doing it.

Disconnected the battery to help the ECU relearn.

I thought about the pedal travel sensor: what do you think ?

I can manage the shifting built-in anoyance but, this hesitation, i can't do anything to control it !

Thanks much for your help by giving me any tips to get rid of this problem !
 

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Discussion Starter · #5 ·
As i don't want to put too much money on the car, i was thinking about firmer engine mounts, a new clutch with firmer springs, a lighter flywheel or a chip burning but....... NOTHING IS AVAILABLE for this car to enhance performance :wallbash:

Thanks for your help !
 

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Discussion Starter · #9 ·
QUOTE (Sleepy3103 @ Jun 26 2010, 02:19 AM) index.php?act=findpost&pid=336263
Are you talking about a hesitation as your accelerating, or at the beginning of a shift when you press the gas it hesitates before the engine responds?

If your just talking about the stupid dead play the gas pedals have on these, I have a fix. I just posted a thread(dead spot in gas pedal) that has a link to the info you need to adjust the dead spot out. It's for a Kia forte forum but it has the same engine(2.4 i4) and pedal assembly.

Only during accelerations. From 1st to 2nd and 2nd to 3rd at low speed and low rpms ( below 3k). I guess it doesn't like to show this side of it's torque curve ...
 
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