2003 and 2004 2.7l intermittent hesitation

New Reflash Came out this week


Some 2003-2004 TIBURON(GK) , Santafe , Sonata 2.7L vehicles may experience intermittent hesitation
while driving.
This bulletin provides a procedure for updating the ECM (Engine Control Module)
software with new logic to improve the above condition by using the Hi-Scan Pro.

EF 2.7 Intermittent Hesitation TSB# 04-36-015

SM 2.7 Intermittent Hesitation TSB# 04-36-04
GK 2.7 Intermittent Hesitation TSB# 04-36-016

uhhhh..... care to elaborate on this?...... or jus post and dont really explainanything?

I would love to

Some 2003 and 2004 2.7l engines have an intermittent hesitation. Lets say you were going down the road at 30 mph and you press the gas it would take a few seconds for the engine trans to decide what to do (or hesitate) . I have noticed it mostly on santa fe . Anyway HMA came out with new software for the ecu (Engine Control Module) that will streighten it out .

I wish i could go into technical details about it but im a technitian not an engineer .

Quite a few of my customers complain about this hesitation and there was nothing i could do for them accept say that the vechicle was operating as designed . I just figured you hyundai owners might want to know about it .

.. the torque convertor?.... youre talking abotu an auto trans right?
.. get the torque convertor upgraded

mine doesn't do that, but it has 3 times now, just paused while driving a constant speed. just like it shut off and back on for a fraction of a second. I've got about 18K on the clock.