:( I cant figure this one out. While cruzing down the road, it's fine. But my little Accent revs the motor all by itself when I come to a stop sometimes??? What the hell? It will rev up fairly slowly, never reach redline and slowly drop down again unless I give it gas. I dont understand, anyone have any ideas???

Thanks Neil.

I had a similar problem with my 2003 elantra gt, they replaced the TPS. There was a stored code PO121.

posibilities are:

floormat interfering with the accelerator pedal
sticky throttle plate = clean throttle bore & lub linkage
sticky/binding calbe = check for free movement, lub or replace if binding
TPS sensor = wiggle the connector when engine is at idle, if rpm fluctuate, replace TPS

It'll be the TPS for sure!!

My 2000 Accent used to rev on its own at idle once transmission went in to fail safe mode. Went to dealer no fault found, the car would over rev constantly until one day I tested the battery and found that the lead cells were deterioating and had finally collapsed. Replaced Factory battery and excessive rev has disappeared.

I know a fair deal about electronics and hyundai's so my diagnostic could be a fair assumption given the evidence you have put forward. My adviceis to temporary replace the battery and see what happens.

If the problem has disappeared email me and I'll email Hyundai Australia to investigate the faults at a worldwide scale......

I have also found out through vrious forums that the standard Hyundai battery is not very good - mine failed about 3 weeks after I bought it (went from starting fine to struggling to start overnight) - Luckily my car was under warrenty and they replaced the battery with a heavy-duty one at no cost (although I did have to push them a lot to get them to put a better one in!).

So if you can get your hands on another 12v battery I'd try that for a bit and see if that makes any difference