2004 Hyundai XG350 won't idle. No codes

BABYBOY15857

MEMBER
2004 HYUNDAI XG350
3.5L
V6
FWD
AUTOMATIC
102,000 MILES

My 2004 Hyundai XG350 will turn over and start but wont idle. It starts and after the initial rev up of the car starting the rpm's drop right to zero and there are no codes showing up. If I start the car and give it some throttle I can make it idle/run. What I have done for a temporary fix until I find the problem is tightened the throttle cable tension adjustment under the hood to give the engine fuel without me hitting the throttle to simulate an idle. I have heard to try cleaning the MAF and IACV and it may solve the issue? Also heard to try checking the Ignition Misfire Sensor? Any ideas would be greatly appreciated?

3 Replies

TY ANDERSON

MECHANIC
684 POSTS

Check for any broken/cracked hoses connected to the intake manifold. Your looking for any vacuum leaks that will disrupt the idle quality.

Your Idle air control valve could be stuck open or your mass air flow sensor. Some models you can disconnect the mass air flow sensor and the engine will run better (doing this will also cause the check engine light to come on) if it is the mass air flow sensor.

Check the throttle body for coking, if there is any build up on or around the throttle plate/ throttle body this will also cause the engine not to run very well at idle.

Let me know what you find or if you have any more questions.

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Wednesday, January 15th, 2014 AT 7:28 PM

VADA CINAMON

MEMBER
1 POST

Was there ever a solution found for this problem?

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Wednesday, April 6th, 2022 AT 9:32 PM

KASEKENNY

MECHANIC
18,907 POSTS

Unfortunately, this one is almost 10 years old so it is unlikely that they will respond.

However, we can try and help figure out what you are dealing with. It is fine if you want to continue here but if you have a different year or vehicle then it is best to get a new post started.

https://www.2carpros.com/questions/new

This will give us all the specifics to your vehicle and issue, and we will be able to solve that which will help others in the future.

Thanks

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Thursday, April 7th, 2022 AT 10:14 AM