i have now seen 2 civic with swaps in them that do the same thing. when they are in idle, it seems like the motor keps reving by itself. it revs maybe up tp 1800k and then back to 1000k. do all swapsdo that, just wondering.

 

Sounds like a bad 02 sensor. All swaps dont do that.

 

No there is something wrong. Could be timing, vacuum tubes, or other stuff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by _BEN_ &raquo;</TD></TR><TR><TD CLASS="quote">No there is something wrong. Could be timing, vacuum tubes, or other stuff. </TD></TR></TABLE>

Mine did that when I first put it in... I had a dirty IAC valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nub.96ek &raquo;</TD></TR><TR><TD CLASS="quote">

Mine did that when I first put it in... I had a dirty IAC valve.</TD></TR></TABLE>


or it might be your fitv

 

The IAC under the throttle body needs adjusting no biggie.

 

nope.. not a good sign when it does that...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20badboy &raquo;</TD></TR><TR><TD CLASS="quote">The IAC under the throttle body needs adjusting no biggie.</TD></TR></TABLE>

what is IAC?
how is it adjusted?

 

http://www.emotors.ca/Articles/article.aspx?id=97

The valve that is pictured is located right under your throttle body, and has two coolant lines going to it. Take off the small coolant hoses, and the two 10 mm bolts holding to to the TB and check it.

 

IAC valve diffinitely the spring pops it out too much and it makes the idle go up and down. annoying but sounds like you have some hard core cams.... lol easy fix. take it off and clean it and tighten the spring into it again. 5 - 10 minute fix and walla .... good as new.

good luck

 

its 3 bolts on a b16-b18

 

This thread is perfect for me

I've been figuring something similar all my life!

Check https://honda-tech.com/zerothread?id=1170181

 

if you want to find out if its the iac get a piece of a cereal box and cut out a section of it. loosen the bolts on the iac and slid it inbetween the iac valce and the manifold. tighten it down and fire it up.if it goes away there is your problem.

 

I always wanted to know why people's hondas do that. next time I see someone at a light that thinks they they got something cool going on i'll let them know they have a cool malfunction

 

adjustments and fine tunning needed.


all swaps are not like this.

 

my teg used to do the same thing, then it would idle steady after it warms up