Question about 2004 Hyundai XG350

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2004 hyundai xg350 stalls when warm restarts when cold

Starts when cold stalls when it gets up to temp both fans work mafs cleaned slight before it shutsdown

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Sounds to me like it could be the engine coolant temp sensor.If the ECT goes bad it will run very rich which would allow it to run fine when cold but choke out and stall when warm.i know it sounds silly because people say what does coolant temperature have to do with the fuel ratio? But with fuel injected vehicles these day they do not use choke flaps or enrichment valves so the ECT sends the temperature info to the cars computer and it then uses that info along with info from other sensors to adjust the fuel to air could try to simply unplug the ECT and see if it cures the stalling issue.If it does not stall when unplugged then replace the ECT

Posted on Apr 17, 2014


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Posted on Jan 02, 2017

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SOURCE: where is the fuel filter on 2004 hyundai xg350

It is most likely in the fuel tank

Posted on Mar 09, 2009

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SOURCE: from cold start engine warms to quater temp then

Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Otherwise, guesswork. I have MANY ideas that could send you on a wild goose chase. I strongly suspect EMS (Engine Management System) sensor beginning to malfunction as it warms up. First strong suspicion is the crank position sensor (CKP) - however,usually always sets a DTC (i.e., P0335, P0336). The next suspicion is the Engine Coolant Temperature sensor. The ECM uses this sensor's signal to adjust fuel, timing, engine RPM, etc based on engine temp. If malfunctioning at a particuar point during engine warm up, it could be telling the ECM the temperature is LOWER or HIGHER than it ACTUALLY is, resulting in the ECM to increase fuel (flood it) or give it LESS fuel (starve it). If this malfunction lasts long enough, the ECM will usually set a DTC for that sensor circuit, either a Range/Performance code, or a "LOW Input" or "HIGH Input" code.

Posted on Jun 07, 2009

  • 73 Answers

SOURCE: how to change spark plugs 2004 hyundai XG350


Posted on Aug 06, 2009

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SOURCE: where is the fuel filter located on a 2004 hyundai

Welcome to fixya.
Under the vehicle at the left front corner of the fuel tank.
If you need anything or schematics go to

Posted on Aug 10, 2009

  • 14036 Answers

SOURCE: power steering in hyundai xg350 doesn't work. Put

power steering need bleeding if your reservoir was dry when you added fluid if.fluid was okay not too low.your power steering pump could be faulty.the cold weather will effect it.

Posted on Dec 13, 2009

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Jul 01, 2012 | 2004 Hyundai Elantra

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When the AC is not on, I am getting hot air blowing out of the vents, Ugh..2005 Hyundai XG350

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Sep 07, 2011 | 2004 Hyundai XG350

1 Answer

I have a 2002 hyundai xg350 it stalls at random. it doesnt sputter or cguh just a silent stall. Then when I try to restart it it sputters and i have to hold down the gas pedal

If the car runs fine otherwise then check the IAC; idle air control vavle. It controls the idle speed and may be gummed up with deposits. Sometimes all it needs is a shot of carb cleaner to get it operating properly. Also your MAF may need cleaning. Only use cleaner designed for this purpose. Lastly there may be a problem with the EGR valve; it may be stuck open. This can also be cleaned with carb cleaner after being removed from the engine. If the check engine light is on have the codes read, this may lead you in the right direction.

Aug 16, 2011 | 2002 Hyundai XG350

1 Answer

Car doesnt start when it is cold,when the temp goes up car has no problem starting.any suggestion to whats wrong?

you could try a oil stick that keeps the oil warm so to will not get cold or park it in side, i have put a lamp under my car when it gets cold to keep the oil warm..

Jan 23, 2011 | 2002 Hyundai XG350

1 Answer

The car starts fine but cuts out after it warms up and won't start until it is cold again

Sounds like O2 Sensor but if you have a c heck engine light on scan with obd2 scan and retrieve codes and fix guessing can be to expensive.

Dec 20, 2010 | 2004 Hyundai XG350

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