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2001 Hyundai Elantra (automatic) RPMs jump while driving

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Oct 8, 2011, 6:43 AM

Post #1 of 1 (3437 views)
2001 Hyundai Elantra (automatic) RPMs jump while driving Sign In

Hello all. I just bought an automatic 2001 Hyundai Elantra (2.0L, 131k miles).

Everything was fine for the first day, but yesterday I was driving down the road going about 45/50 MPH when the RPMs jumped from about 1900 to about 4000. The RPMs didn't go up and down, they just stayed around the 4000 range. It would continue to run high whether I accelerated or slowed down until I turned off the car and restarted it. Obviously as the RPMs jumped, the car slightly jerked. I've read about transmission slipping, but I'm really not sure if that's it. I was still able to accelerate. It wasn't like I was in neutral. It just felt like I had downshifted and had to work harder to stay where I was.

I also started it today and it ran about 2500 RPMs just idling until I restarted it.
Are these two problems related?

I live in Florida, so my car is never exposed to cold temperatures or anything like that.

I honestly have no clue where to start as far as diagnosing this. I hate to think that it's a major transmission problem. Could it be a sensor issue?


EDIT: I should make it clear when I say that when it ran high whether I sped up or slowed down, the RPMs moved proportionally. They were at about 2000 going 25 MPH. I don't know if this makes any difference, but I'm just trying to be as detailed as possible!

EDIT 2: Wow. Ya. Also the transmission fluid is fine. Brand new. Clear, bright red. The people I bought it from just had this car tuned up/serviced before I bought it.

(This post was edited by kyleiship on Oct 8, 2011, 6:58 AM)

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