idle issue - 3k rpms?!?!

[Niterdr]

okay so i just recently changed my oil from a 10w-40 to a 10w-30 due to the cold weather and winter. after doing so the idle likes to sit between 2k and 3k rpms. for some reason it was acting up a while ago during summer and used to be around 1500 rpms. do you think the oil could be the problem? ive thought about it but it wouldnt make sense since its a fuel related issure. the car sounds like its misfiring but im not sure. its a ka24de-t and is run off an aem ems and has a fuel lab fpr, ams/turbo240 fuel rail, and 650cc injectors. it runs stoich even at the high rpms in idle so idk what it could be.

spark plugs? throttle body? i just dont want the motor to pop. thanks for any help!

[Niterdr]

can anybody help?

[redsx13]

okay so i just recently changed my oil from a 10w-40 to a 10w-30 due to the cold weather and winter. after doing so the idle likes to sit between 2k and 3k rpms. for some reason it was acting up a while ago during summer and used to be around 1500 rpms. do you think the oil could be the problem? ive thought about it but it wouldnt make sense since its a fuel related issure. the car sounds like its misfiring but im not sure. its a ka24de-t and is run off an aem ems and has a fuel lab fpr, ams/turbo240 fuel rail, and 650cc injectors. it runs stoich even at the high rpms in idle so idk what it could be.

spark plugs? throttle body? i just dont want the motor to pop. thanks for any help!

both of those idles are way too high, it should be around 750rpms.

-there is no way it is an oil problem, unless you have an automatic trans.
-check your throttle cable and make sure it has play
-adjust your idle using the stop screw on the throttle body. get it down to 750
-It sounds like you have a problem with your iacv, If the KA has one.

[Niterdr]

yeah i thought that couldve been an issue but for some reason im thinking its a fuel issue. ill try that and see what happens. thanks.

[Niterdr]

okay so i went out to look at it yesterday (couldnt lately because of snow and cold) and im not quite sure which screw you mean i have to adjust. can you quickly describe where its located? because i dont want to accidentally loosen the wrong thing and not be able to drive it home from school. i appreciate the help.

[Niterdr]

can somebody point out exactly where the idle adjustment screw is? maybe a pic or something? thanks.

[wangan_cruiser]

for s13 sr look in the middle of the intake plenum from top and u will see it.