2004 Hyundai Elantra, dies when idling, very slow acceler...


2004 Hyundai Elantra, dies when idling, very slow acceleration but will reach higher mph. RPM goes up but mph is sluggish. Did transmission flush and oil change Mechanic's Assistant: When was your last oil change? 4 days ...

2004 Hyundai Elantra, dies when idling, very slow acceleration but will reach higher mph. RPM goes up but mph is sluggish. Did transmission flush and oil change Mechanic's Assistant: When was your last oil change? 4 days ago Mechanic's Assistant: Are you fixing your Elantra yourself? What have you tried so far? I am. Replaced spark plugs and wires, oil change, transmission flush Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? No check engine light

Automotive Expert
Welcome to Just Answer I'm Chris aka Moose, I'm sorry you are having problems with your Elantra. I will do my best to help you get this resolved. If I happen to be helping another or step away during our communication, please know I will follow up as soon as I am back available/online. - Does the engine idle fine and rev up fine in park? - The old trans oil did it have a bad odor and color? - Any codes stored?

No check engine light. I didn't do the trans, jiffy lube did. But yes when accelerating before, and after the flush there is a foul oder. When I fill up the gas tank because I've run it all the way down, it idles for a second then dies. Then it takes me cranking it 3 or 4 more times for it to stay running.When it's hot outside and I'm doing in town driving, it tends to die when at a red light.When it's cooler, such as late at night, it runs better than when the sun is up. However it never goes above the normal temp line
Automotive Expert
You have described symptoms that fall in line with more than one issue. I suggest you have a transmission shop drive the vehicle to see if there are any transmission concerns. For the stalling issue, I believe that is going to be a dirty throttle body and MAF sensor that needs to be cleaned and a faulty idle air control valve that needs to be replaced. Thank you for visiting Just Answer, I hope I was able to answer your question. If you need to follow up on this concern please use the reply button. If you are satisfied with my answer please reply, let me know so I can complete your question. Stay safe (Covid). Moose
Automotive Expert
Are you still needing assistance, if so let me know? Please reply and let me know if I have answered your question.
Automotive Expert
It appears you have no more follow-up replies. I'm going to mark your question complete before it times out. Keep in touch if needed.

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