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QUOTE (milehighclub @ Jun 23 2010, 01:47 PM) index.php?act=findpost&pid=335579
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 !

There is a Program for the 2009/2010 M/T PCM available.... I cannot find TSB about it to know what it covers, but I have ran across the program when I was looking to update 2009 automatics before they made the GDS integrate the 2009/2010
into the same line..

Try going to dealer, and see if they will find out what #158 is for, or just go ahead and try it... they will have to manually enter vehicle as a 2009 so the GDS will allow them to proceed, then they will have to do the program in manual mode..

Good luck.

I have driven a couple of the 2.4 M/T cars, hate the throttle sychronization.. especially after driving my own cable operated throttle for last 21yr with M/T...
 

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Go to dealer and ask them to install program #158 and see what/if it does anything (provided it is a 4 cyl M/T car)
 
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