my car idles from 1 to 2 1/2 grand all the time its not the pcv though any thoughts?
going to see if i can diagnos problem tommorow.

 

vacuum leak. Maybe.

 

I would put money on the Idle Air Control Valve. Mine did the same thing. Unplug it and see what happens. Could be a vacuum leak tho.

 

unplugged idle air control it just idle up and down faster

 

Do u have a MIL?

 

Any Mods?

 

cold air, and exshaust

 

as in machine shop mill?????

 

lol, malfunction indicator lamp. (check engine light)

 

no check engine light (god i fell retarted)

 

but i just replaced the head 2 days ago, it did it when it was cold but it warmed up and it was fine today i left taco bell bounced it off the chip a couple times and know it revs like that constantly

 

My idle went to hell a little while after I installed my CAI, header, and exhaust. The basic bolt ons will throw your air fuel ration off just enough to screw with your idle. Normally the car will run fine, but it becomes choked up during idle.

 

yeah but it idles fd up all the time

 

Haha, dont worry about it. I was just too lazy to type it out. lol Well anyway, according to helms if you have no MIL you are supposed to hold the engine at 3k with no load untill your radiator fan comes on. Then, release the throttle and disconnect the the wire to the IACV. If there is no reduction in rpm then the IACV is bad. If there is then it could be a few different things. However if you rpms are fluctuating you likely wont be able to tell if whether or not there was a reducion in rpm. With all this being said I am starting to lean more toward a vacuum leak somewhere.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19_lude_s_96 &raquo;</TD></TR><TR><TD CLASS="quote">but i just replaced the head 2 days ago, it did it when it was cold but it warmed up and it was fine today i left taco bell bounced it off the chip a couple times and know it revs like that constantly</TD></TR></TABLE>

lol, it could be the taco bell

 

you never know ive had so many problems with this car lol, but hopefully ill find the problem tommorow but if not im picking up another prelude next week 92
SI sweet

 

i also read somewhere that a low coolant level can make it idle funny has anyone heard about that????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19_lude_s_96 &raquo;</TD></TR><TR><TD CLASS="quote">i also read somewhere that a low coolant level can make it idle funny has anyone heard about that????</TD></TR></TABLE>

If your coolant is not bled and has air bubbles it can cause an erratic idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheKINGPin &raquo;</TD></TR><TR><TD CLASS="quote">vacuum leak. Maybe.</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dougs96SI &raquo;</TD></TR><TR><TD CLASS="quote">My idle went to hell a little while after I installed my CAI, header, and exhaust. The basic bolt ons will throw your air fuel ration off just enough to screw with your idle. Normally the car will run fine, but it becomes choked up during idle. </TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">

If your coolant is not bled and has air bubbles it can cause an erratic idle.</TD></TR></TABLE>

It wasn't any of this ^, it ending up being IAC and whatever is connected to the IAC through coolant lines thanks for your help

 

problem fixed!!!!!!!!!!!! it makes me happy when things work out.........sigh..........

 

after reading this im a little lost, i have the same problem with mine but i really dont know anything about all the parts that bolt onto the engine, so would anybody be kind enough to give me a basic step by step on what im actually supposed to be fixing, or i link to a write up would be very helpfull.

cheers

 

I had the same problem for the past 3 months and could never figure it out and could never get anyone to help me with it at all. I ran across the 92lude.com site and there was a "IACV Mod" that you could do and when I did it...My problem was fixed. So I think if anyone is having the idleing problem, then they need to try to mod off of 92lude.com ... IT WORKS!

 

so which one do i need to play around with???

 

anyone?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreludeH22vtec &raquo;</TD></TR><TR><TD CLASS="quote">anyone?</TD></TR></TABLE>

I'm anyone you need to (mess) with IAC which is the one on the front of your plenum towards engine