ok well my prelude has been having a really bouncy idle for about a day it goes down to 1000rpm then jumps to 2000 any got any suggestions as to wat it could be?!?!

 

You could have many problems, I for one think it might be a vacume leak somewhere under the hood. I had a similar problem right when it got cold outside. I didn't have the problem in the summer, but when winter came along...this stuff happens.

You should check to see if everything under your hood is tight and no hissing noises.

Does it do this when you have your heater or a/c on?

 

you might check the pcv valve/hose

 

i'd look for vacuum leaks also...you should hear a hissing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xxredpreludesixx &raquo;</TD></TR><TR><TD CLASS="quote">ok well my prelude has been having a really bouncy idle for about a day it goes down to 1000rpm then jumps to 2000 any got any suggestions as to wat it could be?!?!</TD></TR></TABLE>


I had the same problem, just remove the fast idle valve controller(FIVC) and twist the plastic screw in clockwise. First, you remove FIVC from the throttle body. Second, you remove the cover. Last, twist or screw the plastic screw in. The plastic screw is adjusted to idle correctly from factory. Through time the screw unwind itself because of the spring load. I hope this helps. If this is not the problem then you have a vacuum leak.

 

Could also be air trapped in the cooling system.

 

I had a similar prob, I took off the IACV, cleaned it with throttle body/carby cleaner and it's idling fine.

 

hmmm thanx for the replys and suggestions guys im new to the prelude my bro has a 5th gen i love mine and i just got done replacing my busted header with a dc header man my busted was loud but ill try these suggestions then get back to you all and actually i do hear a hissing so ill have to check it out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dai_Ca_Vietnam_H22a4 &raquo;</TD></TR><TR><TD CLASS="quote">
I had the same problem, just remove the fast idle valve controller(FIVC) and twist the plastic screw in clockwise. First, you remove FIVC from the throttle body. Second, you remove the cover. Last, twist or screw the plastic screw in. The plastic screw is adjusted to idle correctly from factory. Through time the screw unwind itself because of the spring load. I hope this helps. If this is not the problem then you have a vacuum leak. </TD></TR></TABLE>

Wouldn't that be the throttle plate adjuster screw? Also I thought this was not suppose to be adjusted (for B series, D series I heard). I heard this only put's off the problem and will eventually re-appear. My friend has the same problem on his 5thgen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EM2Civic &raquo;</TD></TR><TR><TD CLASS="quote">Wouldn't that be the throttle plate adjuster screw? Also I thought this was not suppose to be adjusted (for B series, D series I heard)</TD></TR></TABLE>

No, what he's trying to say is FAST IDLE THERMO VALVE (FITV) on the bottom of the throttle body. The best solution IMO is to bypass it completely, which will also lower your intake temps slightly.