Question about 2004 Hyundai Elantra
My car recently started doing this weird thing. It will ONLY SOMETIMES start reving up to 2-3 rpms and then down 3 or 4 times on its own and then sputters out and dies. This happens sometimes when I am either starting to go from park or after slowing down to a stop light or something. Also like I said it doesnt happen all the time, only about once a day, but the check engine light is not on and no codes are showing up.
(FYI- just changed timing belts, driving belts, had transmission flush, and replaced O2 sensor and speed sensor!)
The previous solution to check the idle air contol is in the correct area but needs some clarification.
The idle control is accomplished by two parts: Throttle position sensor ( $35 at Autozone) and idle contol valve approx $190. I replaced the throttle position sensor about a week ago and it runs perfect
to date but am a skeptic after almost two years of dealer incompetance. I researched all the sensors and failure symptoms on the internet and the throttle position sensor failure symptoms matched mine
exactly. See http://wiki.seloc.org/a/Throttle _Position_Sensor
Posted on Dec 04, 2008
I had the exact same thing happening with mine! I think it's called? Oh no i lost it! It's a belt if your looking under the hood it's on the left. I replaced all kinds of things and spent all kinds of money cause nobody knew exactly what it was untill it broke down on my halfway thru a 350 mile trip! Timing belt i'm pretty sure! Have someone to check it for wear.
Hope this helps,
Posted on Feb 05, 2009
Check your i.a.c (idle air control ) it happened it me i changed it and all was better
Posted on Nov 22, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
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You will need to have the computer control unit most likey replaced, it is called the ECU or PCM
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