when i turn the car on the idle is fooked it goes up and down up and down constantly when i plug the top hole on the top of the iner side of the throttle body it stops and goes to normal the hole inside the TB before the butterfly, what does this translate to?

 

?

 

fast idle valve , big white screw inside needs to be screwed in (underneath t-body, has a brass plate on the back with 2 8mm bolts holding it on .

 

not sure what vacuum line you are talking about but you eithre:

1) blew a line off and its dangling somewhere
2) need to plug the hole and just say **** it.

 

he was talking about the fast idle port on the inside of the t-body not a vac. line

 

 

i put my finger over that hole inside and then it works fine...

 

hook ups which screw u talking bout?

 

Stock motor or swapped? What happened when the motor started doing this? I would personally be pretty hesitant to adjust that idle screw if its a non-modified motor. Its not like the idle air adjust screws on a carb.....not really meant to be messed with.

 

The FITV screw
Read this
http://www.ef-honda.com/ben/Badidle.php

 

its a swaped engine jdm d15

 

im going to try and swap out TBs on the engines

 

you dont have to worry about the fast idle valve screw messing anything up trust me ive been doing this for a while . anyways directly below your throttle body there should be a valve with 2 coolant lines coming from it . on the back(firewall side) there is a copper colored plate that is held on by 2 8mm bolts. behind that plate is a large white plastic screw with a copper nipple in the center. the screw has 2 slots in it where you can use a stubby flat head screwdriver to turn it inward(tighten) these screws back themselves out over time due to vibration and such

 

honda uses a honda sealent.... take the screw out... get some sort of air tighting sealent then screw it back in... should do the job... and let it settle for a week...if the problem still consists.. it could be Fast idle... or IAC (air control) valve have to be replaced

 

I think the top hole goes to IAC valve and the bottom hole is for fast idle valve. IAC valve is mounted on the back of intake manifold

 

think it was the IACV because when i was pouring water into rad it started leaking =p ill update tomorrow when i swap out iacv's

 

Does it idle normal once the car is heated up?

 

i left the car on for like 5 mins and idles the same
i replaced the iacv with one that i knew worked and still keeps surging from like 2.3k to 1.5k

 

aight if you replaced the iac valve ... check the fast idle thermo valve...and pretty sure the screw that needs to be adjusted is on the iac valve....

 

Read what people are typing instead of just posting in this thread for the sake of posting, LB562.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pdiggitydogg &raquo;</TD></TR><TR><TD CLASS="quote">The FITV screw
Read this
http://www.ef-honda.com/ben/Badidle.php
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pdiggitydogg &raquo;</TD></TR><TR><TD CLASS="quote">The FITV screw
Read this
http://www.ef-honda.com/ben/Badidle.php
</TD></TR></TABLE>

 

dood i was just answering the guys question chill the **** out, higher your post count on someone elses thread, anywho... checked the lines, adjusted the screw behind the brass plate.... still keeps doing it.... it stops and idles fine when i put my finger in the iacv hole inside the throttle body, it also idles fine if u unplug the iacv

 

When you say it 'idles fine' - what do you mean? Because if it idles up around 7-800rpm, then its NOT fine. When you disable the IACV (just unplug it), the idle should drop to base idle speed which is about 500rpm. If yours is sitting up above that, you've either got a vacuum leak or the base idle is just set to high.

Did you mess with either of the two screws on the throttle body (throttle plate stop screw or the actual idle air bypass screw)?

With the engine hot, does the lower hole have suction? It shouldn't and if it does then you need to fix that. The 'fix' has been given above.

 

yeah if the iacv is unplugged it idles at 500rpm... when i plug it back on it goes ot like 1300 and keeps surging up and down....


also it does suck in a little air form the bottom hole when the car is warm

 

whoa

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">Did you mess with either of the two screws on the throttle body (throttle plate stop screw or the actual idle air bypass screw)?</TD></TR></TABLE>