[ale] [OT] [way OT] dealing with funky problems in hyundai vehicles

[Ron Frazier (ALE)]

Hi Sean,

Does the engine choke down?  Regardless, you might want to check the throttle position sensor and the crankshaft position sensor.  You could also check to see what tsb's or recalls are on the hyundai web site for your model.  You may have to go to some place like edmunds.com for recalls.  I don't know.  Finally, you might see if there are any program updates for the ecu through a dealer, not something to be done lightly though.

I was having a discussion with my wife recently about the potential fragility of a design in which the computer runs everything and depends on all these sensors.  Now, I'm sure there are numerous advantages to doing this.  However, if you take an old design where there is a mechanical fuel pump, mechanical oil pump, mechanical water pump, mechanical carburetor, mechanical linkage to the gas pedal, and spark plugs driven by distributor, points, and coil; you have to have something pretty radical to stop the engine.  Oh, and the fan was attached to the crankshaft.  If the engine was turning and the water pump was working, with coolant, it was cooling.  If you have a diesel engine, with no ignition system, things are even simpler.  Although, the fuel injector pump on my old Mercedes is a complicated affair, kind of like a mechanical computer.

With our modernization, I think we've potentially made things much more prone to failure.  I'm not a mechanic, so I could be wrong.

Interesting what you said about the gauge.  I can definitely see it creeping up from zero to the operating temp, rather than jumping up, for example.  It gets to just below the mid point and stays there.  As far as I know, I've never had a serious overheat.  So, I don't know what it would do in that case.

With an android tablet, obd scan tool, and the Torque Pro program; or a scangauge device, you can keep an eye on the temperature and get an exact number.  I use my tablet for this along with a bluetooth obd device.  However, I also use the tablet for other things, so I'm always taking it out of the car.  I'm considering getting a 5" or 7" tablet from Big Lots and a usb based obd device to use just as an instrument panel.  That could stay in the car all the time.  Also, that way, I wouldn't be broadcasting the bluetooth signal that someone else could, potentially, hack into.

Sincerely,

Ron



Sean Kilpatrick <kilpatms at gmail.com> wrote:

>I have a Hyundai Santa Fe 2011.  My problem is with the fly-by-wire 
>throttle, which (only) at the worst possible times will not feed gas to
>
>the engine from a full stop -- like stopped at a light on a steep hill.
>I 
>take my foot off the brake and press on the gas peddle -- and the car
>rolls 
>backward.  Not Good!
>
>But, I am writing to comment on Ron's notes on the Hyundai water temp. 
>guage.  The one on the dashboard >looks< like a real temp. guage, but
>it's 
>not.  It is actually a three position "idiot light."  Its three
>positions 
>are, Cold, Operating temp. and Overheat.
>I do not know at what point the "guage" will indicate Overheat, but it 
>registers Operating temp. from 157 F up through 235  F. I can assure
>one 
>and all that this does not help much when towing a one-ton trailer over
>a 
>10k foot mountain pass in Colorado.
>
>Sean
>
>--------------------------------------------------------------------
>
>
>On Friday, September 13, 2013 02:57:48 pm Ron Frazier (ALE) wrote:
>> Hi all,
>> 
>> This is a diverse group of people with many different interests that
>we
>> discuss here.  I've been working on solving problems in power
>> protection, gps's, scripting, lighting, audio recording, eyeglasses,
>> and automobiles over the last year and you have given me help on many
>> of these.  I appreciate that.  I always try to share what I learned
>> back to the group in case the info will help others.
>> 
>> For some time, I've been trying to solve some funky problems with my
>> 2005 Hyundai Santa Fe.  I think I've found some solutions, and I want
>> to share them in case someone else can benefit.  This applies to
>other
>> Hyundai's too.

-snip-



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Ron Frazier
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