OK, about 80k on this car, and other than the notorius elantra headlight issues, this is the first problem i've had... It will rev itself, especially when I come to a complete stop, sometimes intermittently when at rest, anywhere from 1100 rpm all the way to 3000 rpm-- a tap of the accelerator usually straightens it out...
what does everyone think? O2 sensor? If so, how do I change it? I'm not an automotive idiot, just don't get under the hood of newer vehicles often (I have 3 ice cream trucks, all 70's era chevy panel trucks)--- but I need to get the Hyundai running right, and want to do it as cheaply as possible...
Thanks in advance folks.