wonder why my car idles high after hard driving or long driving?
 

ok i drive my car nice and easy for the most part, around town it will idle nicely at 1k or a tad lower only when i dont get into it, however if i gun it and hot rod it or just go fast on the freeway 70-75 then when i stop it then idles at 1400 or so rpms!! does anybody know why it does this? ive ruled out the throttle cable being stuck because when i kill it and crank it again it idles normal... its really bugging me right now... thanks in advance

christopher

dont blame yall for not wanting to look at another idle thread

anybody?

Yeah, I'm not sure. But when I drive my car slow it idles at around 1k, maybe a tad lower, just like yours. However, after hard driving it idles to a perfect 750.

I suppose I would try an oil change, and/or spark plug change depending on how long it's been. And while many people don't recommend synthetic, give Royal Purple a try. It's the smoothest thing I have ever run.