Question about Hyundai Motor 2004 Sonata

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2004 6 cyl sonata idles high and stays there after u give gas alittle bit until u put in gear or shut off somebody put throttle sensor in did not fix it also tried idle air control valve no better and checked throttle body and cable both good

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Check for vacum leak

Posted on Mar 07, 2009

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2 Answers

How can I fix high idle?


In theory once the desired idle speed is programmed into the management system, in the absence of such faults as air leaks, sticking idle air control valve and suchlike it should be impossible for the idle speed to be much different from the programmed value because the ECU should continue closing down the amount of air bypassing the throttle butterfly until the idle is around the correct value.

I think you need to go back to basics and double-check the work to ensure everything is as it should be. In the absence of mechanical faults and ignoring the possibility of electronic problems a high idle must be caused by too much air entering the engine, either because the idle air control valve is not closing properly or because the throttle butterfly is not closing fully.

It is worth noting air can enter the intake through leaky diaphragms, split vacuum hoses or faulty pcv systems. It is also worth checking the egr valve if fitted.

Jan 24, 2016 | 2006 Chevrolet Cobalt SS

1 Answer

Replaced Throttle body throttle position sensors


There is another sensor mounted to the gas pedal. It has to communicate with the throttle body assembly. If the correlation is not correct between the two, the problem will persist. The throttle body assembly is usually the most common of the two, however the accelerator position sensor still gives problems.

May 11, 2015 | 2004 Nissan Quest

1 Answer

Idle high in park


May either be a sticky throttle linkage requiring lubrication, or the TPS (throttle position sensor).

Apr 07, 2014 | Mazda 626 Cars & Trucks

1 Answer

Idling high


I would check the engine coolant temperature switch 1st.

Jan 24, 2014 | 2004 Hyundai Santa Fe

1 Answer

2004 grandprix gt has this issue where it will only start if given alittle throttle


Check the throttle position sensor adjustment .Check for correct idle speed sensor. Check MAF sensor. If you have replaced any item with non genuine item it is possible that the cpu is having trouble reading the settings as they are different to genuine settings. While there are no fault codes showing the settings may be at max or min and the codes will not show up.

Apr 21, 2013 | 2004 Pontiac Grand Prix

1 Answer

My car would start this morning but then kept shutting off. I replaced the throttle positioning sensor now it stays running but at a real high idle?


Possibly the wrong TPS? Also check for carbon build up in your throttle plate; if there is you may clean it with choke cleaner - be careful not to get the choke cleaner on your idle air control motor as it will cause it to seize.

Your IAC motor may be faulty. Remove it from the throttle body and push down steadily with your thumb; it should move without applying too much pressure; if not - replace. You will need to drive the car after replacing an IAC motor so that your computer can "learn" the idle position.

Sep 04, 2012 | 2004 Chevrolet Chevrolet Impala

1 Answer

My 2001 Hundai Sonata (4 cyl) either idles very roughly or dies when idling or when I am stopped at a stoplight or stop sign or in traffic. The only way to keep the car from dying seems for me to keep one...


OK!.... it's got more than 185.xxx miles.. right? (out of warranty). FIRST place to check:
1. TPS - Throttle Position Sensor - it's a potentiometer (variable resistor) which sends voltage signals to the ECU (Engine Control Unit). If it is malfunctioning (defective), it can cause the drivability issue you describe. However, this is NOT ALWAYS the case since you mentioned the vehicle has more than 185,xxx miles.
2. ECU (Engine Control Unit)
3. Vacuum Leaks
4. Injectors (leaking/clogged)
5. Deffective MAF (Mass Air Flow Sensor)
6. ... want me to continue?... best advice, have it properly diagnosed at an authorized Hyundai Service Department --- this way you'll know EXACTLY what the CAUSE is, and the parts/labor required to fix it!

Feb 20, 2011 | 2001 Hyundai Sonata

1 Answer

04 Jeep starts but stalls when put into gear.


make sure your idle air control motor is working, if you give and hold gas pedal a little will it stay running in drive.

Oct 03, 2009 | 2004 Jeep Grand Cherokee

1 Answer

It won't stay running when put into gear


check for engine vacuum leaks and clean the throttle body and idle speed control air bypass valve, also have the system tested for stored trouble codes, below is how to do that test manually. go to the link.
http://check-engine-light-codes.blogspot.com/2006/03/gm-1983-95-vehicles-obd1-codes-self.html

Aug 08, 2009 | 1989 Pontiac Firebird

1 Answer

04 Saturn stalling on take off and stops.


Pour the fuel injection cleaner to it....sounds like the injectors are dirty.....

Jan 30, 2009 | 2004 Saturn VUE

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