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

that's not the main issue here, the main issue is, why did my idling change so suddenly upon spraying carb cleaner to the TB and wiping it with a clean cloth coz of sticking gas pedal. that's what making me go nuts. i didn't touch anything
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because you messed with it and it doesnt' like you when you mess with it. your car hates you now...

same thing happened to me. eventually it just went away... starting to think that carb cleaner is a bad idea..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondatim &raquo;</TD></TR><TR><TD CLASS="quote">Well, it sounds like you TB shaft bushings are worn out.

Sounds like it's going to need a new throttle body.

Sorry I couldn't help you any more with your issue</TD></TR></TABLE>

Hondatim, thanks for trying to help. i really appreciate it.

i hope 92civeg gets his problem solved.

 

its gotta be my damned fast idle thermo valve..its just gotta warm up around here so i can get to it

 

does the fitv adjust when the car warms up...because once the car is warm it doesnt do it

 

the fitv raises idle when you start the engine cold for warming up when the engine has completely warmed up the idle is then control by the iacv.

 

The FITV contains a thermo-wax plunger that sits in coolant. When the coolant is cold, its open and allows additional air into the manifold. When the coolant begins to heat up, the wax expands and pushes the plunger closed thus sealing off this air passage.

What can happen is the wax gets old, won't expand as much, and won't seal up all the way when the coolant is hot....instant vacuum leak, instant hunting idle. So what people do to rememdy this is remove the 'back plate' and screw the ring inside up so that when the coolant is hot, it actually closes all the way down.

And yes, the FITV should have no effect on the idle once the engine is warmed up. At that point, the idle should be controlled by the IACV (and the idle air bypass screw) as _Endless_ mentioned.

 

ok thanks a lot it sounds like that must be the prob

 

i still haven't checked my fitv (way to cold) but after some researching it a little more, i was wondering if my erratic idle could be caused by a faulty pcv valve since it controls air flow through the crankcase ventilation system i though it might affect the idle if it was bad?

also another thing i was thinking, since it happened right after i reset my ecu, my ecu could be faulty or could it possibly be an automatic p30 ecu? but if it was from an auto my car wouldn't run correct or have the 8200 rev limit, would it?

 

Normallt its the iac maybe when you cleaned out the tb some cleaner or carbo got built up into the iac valve.
JAson

 

im jumping on the wagon ...

i've got the same symtoms, so far i've taken the intake manifold off again cleaned the head and the manifold off with a razor replaced new gasket, change throttle bodies, switch tps sensors, map sensors, iacv's i am not throwing codes, i cleaned out the tb's. so far on my list is switching to p28 ecu and seeing what happens and possibly a valve adjustment just for the hell of it tomorrow.

setup... b20 vtec gsr head


Modified by gaydm.accord at 7:49 AM 2/11/2004

 

My car is doing the same thing. Sometimes the RPM jump up and down at idle, sometimes it idles at 1500-2000, sometimes it just stalls out, and sometimes it idles perfectly.

My pedal seems to be sticking too. If I floor it while driving, my AFC reads 90% but if I floor it with the car off my AFC reads 100%

Also, if it's idling high and I pull the gas pedal out (it doesn't feel like it moves at all) the RPM will drop to either normal, or the motor will stall.

Any clue where I should start? This could be caused by so many things. How should the idle screw be set? I'm not really sure how it works.

Any/all help would be appreciated.

I don't mean to thread hijack either, but it seems we're all having the same issue. I'm just a few steps behind

 

check your throttle cable and the hose that connects under your intake manifold

 

You have a vacuum leak. Measure it too confirm, should be about 22" Hg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondatim &raquo;</TD></TR><TR><TD CLASS="quote">Well then, remove intake tube and there should be 2 holes on inside of TB. try pluggin both of these holes with your fingers with engine running and see if engine dies then. If it does, then you possibly need fast idle thermo valve. If engine does not die, you either have a vacuum leak or throttle plate sticking open.

I forget, did you have stock TB on vehicle or aftermarket?

Let me know...</TD></TR></TABLE>
i have a simliar problem, i tried the unplugged IAC and still nothing, its still idles, also my 99 b16 TB doesn't have a FITV, then what should i do???
also when i pluged the A-hole the car just dies, everytime i plug it it dies

 

i think i may have stumbled upon something today....

well the pcv valve that is under my intake manifold is really ghetto rigged and has been. i didnt know where to plug it to so i just plugged it into my valve cover... i get sporatic idling when its plugged in. when the pcv isnt connected it goes really high and does even higher sporatic. but then when i plug it up it dies but stays constant if i let little air through. thus... my conclusion, that pcv valve needs little vacuum. needs to be connected to another pcv.


i notice that on b20 vtec's they tend to install a pcv valve behind the block i didnt do that... =s. and i had ls vtec before so that intake manifold pcv valve was connected to the oil seperator can. after bringing the car to auto shop today. my instructor said i needed fresh air connected to the pcv or to my manifold, i got lost. but i think he means i need to find a stock intake arm connect the valve cover nipple to the insert in the arm then plug up the intake manifold pcv. or drill and insert a pcv valve into the block and hook up those two..


so what is everyones set up by the way. and if its a frankenstein please elaborate on intake manifold and head.

 

On my 99 Si I'm having the same kind of problem. Some times it idles normal, sometimes it surges between 1000-1500 and sometimes it surges between 2K-2500. I just switched to OBD 1 and installed an AEBS intake manifold. Relpaced all gaskets. Now, when I unplug the IACV, it goes to a nice smooth perfect idle. It worked before the intake manifold and OBD 1 conversion...I can't see it going bad just because I switched manifolds. SOmeone help me please!!!

 

A vacuum leak will cause a dancing idle. The reason why an iac is normally the cause is because the valve sticks open causing unmetered air pass the throttle. MAybe the intake manifold was not installed properly. Did you bolt the manifold on from the center out or from side to side because ive seen people crack intake manifolds by going side too side. Did you hook up all the vacuum lines properly,did you replace the im gasket.

 

talk about return from the dead