Weird Idle

[Aggieland81]

Ok, in about the past week ive notice about 1 in 8 times when i come to a stoplight and im idling the rpm needle is kind of jumping. I got kinda nervous because i didnt know what the hell was wrong. Is this bad?? Is there anything i can do for it? should i take it into a mechanic asap?? i need some advice. the rpms jump from about 500 to 1000 but as i said it only does it sometimes.

[the///man]

this happend to me too. it could be one of two things...oxgen sensor or idle control valve. bring it by the dealership and they will fix whatever the problem is

[Aggieland81]

which was it for you? and how much did it cost, and will it do damage to my engine waiting to get it fixed?

[the///man]

for me it was the o2 sensor. i forgot how much it costs but its nothing too major. it wont hurt your engine but you will get poor gas mileage

[Scarface]

Mine did that too but only after running the car for a while or when it was hot outside,I replaced my 02 sensor because my check engine light was on and it hasnt happened since and my gas mileage went up!