Rpm dropping to 800rpm

[ALe]

When engine is warm its on about 1000rpm with a slight rev and drops below 1000rpm about 800rpm. What's the problem?

[ALPS]

does it come back upto 1k though? meh, mine used to do that too sometimes. i wouldn't worry about it unless it's stalling on you.

[eren]

throttle body needs cleaning?????

[curtis265]

ac coming on?

fans coming on?

[ALe]

No it's not stalling. and yes fans and ac work. So just clean out throttle body?

[curtis265]

sorry, what i meany was are the RPM's dropping due to the ac or radiator fans firing up?

[eren]

sorry, what i meany was are the RPM's dropping due to the ac or radiator fans firing up?
Yes! could just be this , happens to alot of cars! too much hp being used on a/c luls . but i say clean the throttle body anyways you have nothing to loose :)









http://www.ozhonda.com/forum/customavatars/avatar24136_22.gif
-james

[Dylaan]

Mine does this too. In bad cases you can clean the IAC sensor (which is one the throttle body), but I did it and there was no noticeable difference. It is annoying, but it's nothing serious unless it's stalling.

[VeYzZii]

Whats wrong with 800 idle?? 800 +/-50 is where it should be.

[Dylaan]

Mine idles anywhere between 700-1000rpm haha. I'm putting on a cold air intake next week, so I will take that chance to clean my throttle body also.

[osman1]

Could be a vaccum line near the thorttle body, however it sounds ok nothing major.

[fatboyz39]

Clean out the ICAV located on the intake manifold.

[infurNOS]

its fine..

[black8thgen]

mine does it too i thought it was normal? it goes down to 800 and back up pretty soon so it doesn't seem like anything is wrong

[baby_phantom]

mine goes stut stut stuuttutuutututtu

[FongPei]

clean out the throttle body and leave it for a week. i had this problem in my ek, i think it was just a bad mix of two different fuels. now i try just to stay consistent and loyal to V-power =]

[beanz]

Fatboyz is on the money in my opinion. It's the idle control valve (iac valve). Common issue to s2000. The rotary valve builds up small deposits and loses it's ability to turn freely. It is then slow and/or jerky to respond to the ecu when adjusting engine idle. If you're mechanically minded and able the IAC can be removed and cleaned with carb cleaner. The iac motor that controls the valve can be carefully removed with a 5 point torx bit and the input shaft can be turned around by hand until it loosens up.
Having said this it is only applicable to AP1 cars. AP2 vehicles control idle differently I believe.