Idle issues on a 2006 Hyundai Elantra 2.0L GLS

Asked by Dec 08, 2014 at 06:06 PM about the 2006 Hyundai Elantra GLS

Question type: Maintenance & Repair

I recently did some work on my Elantra, replacing the rear struts, rear brakes, while also deciding to change the engine oil/filter and the transmission oil at the same time.  

Once I got all the work done. I started it up and it would idle roughly and lower than normal a bit at the start. I figured maybe the fuel just needed to cycle through a bit since it sat for 2 and a half weeks, so I drove it around for a while to make sure the brakes were all good. Then I left it over night.

Next day I started it up again sat there and the same thing would happen but after about a minute or 2 chugging along it would go into a high idle around 1100 rpm and stay there while park was engaged, tripping the MIL with a p507 code. Once I engage drive or reverse the idle goes down to 800ish rpm.  Consistently now every day it's the same thing.

Yesterday I started it with the same concerns and drove it to work (30 - 40 minute trip).  When I arrived to the parking lot and put it park, it went right back to idling high again at 1100.

I'm just having a hard time putting together the pieces of a low rough idle to start, then it changes to a high idle after a minute or so.

No issues like this prior to doing this work.

I haven't had the opportunity to diagnose it yet really as I've been back to work but maybe if someone might have some ideas on where to start, that'd be awesome.

I have since filled up the tank and ran a fuel system cleaner through it.


5 Answers


Check for vacuum leaks would be a place to start. Bump the pcv or something while you were fooling around in there?

Checked, no vacuum leaks. Pcv really not in a place to bump it but I removed it and cleaned it just in case. Cleaned throttle body and IAC. Managed to clear out the rough idle. But I still get the high idle... The pcv rattles when I shook it but I'd imagine that is normal?


Yes, the pcv should rattle. How did you check for vac leaks?

1 of 1 people found this helpful.

Could be an idle air control valve problem. There are vids on you tube on how to test this. It would also be a good idea to clean the throttle body.

1 of 1 people found this helpful.

ever figure it out? mine does the same thing

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