Hey guys, like the title says, my car is idling really weird. When I come to a complete stop at a light or the car is in Park, the RPMs still rise a bit past 1000 rpm. Normal cars idle around 900 rpm, but my car idles roughly around 1200 rpm. it goes up and down up and down, but it only happens at random times. Anyone know wats wrong?

 

Up and down idle back in the day was always the TPS sensor (throttle positioning sensor) Not sure about our car

 

vacuum hose?

 

i would check for a vacuum leak. it may also be your idle air control valve.

 

is ur ac on??

 

sounds like its time to seafoam if u havent done so

it should make your idle more smooth.

GL

 

Also when the car is fully warmed up, it should idle at around 700-800 RPM's, when cold around 1100 RPM's.

 

Thanks for all the info! I'll take all the advice and get all that checked out.Thanks again :-)

 

Was the car's battery disconnected for some reason, such as having your battery replaced ? If so, your car will idle weird for about two hours (of driving time) while the ECU relearns how to properly idle the engine.

 

that's the idle re-learn, the proper procedure to do this is to let the car idle for 15 min. with any and all accessories such as radio and A/c turned off.

 

What exacty does seafoam do??? just wondering.. and is this good to do?? and where can i go to get it done?

 

read this, this should help

https://acurazine.com/forums/3g-tl-2004-2008-93/seafom-experts-734776/