Ok,

I had a really bad idle surging problem. When cold it would surge all the way up to 3500RPMs. Once, warmed up... it would surge between 1000-2200RPMs.

I read about someone with the same problem, and they made a Fast Idle Valve Gasket to fix this.

So, I did the same (made it out of an alluminum can).

Well, this fixed my idle surging problem! But it still idles kind of high. I have a hondata that is programed to idle at about 800RPMs. When cold, the engine idles at a little over 2000RPMs. And once warm, it idles somewhere around 1100-1400RPMs. It takes a while before the idle settles at 1100, and if I just turn the wheel, the drag from the power stearing pump pully makes the RPMs jump up to 1400-1500. But it doesn't surge any more.

Anyone have any ideas as to why my idle is still high??

Thanks!!


[Modified by PSU-TEG, 10:28 PM 3/10/2003]

 

PS ..... could it be because the Fast Idle Valve Gasket is blocking the coolent from flowing through the fast idle valve to the IACV... and so the IACV is not adjusting the idle to the lower warmed up idle speed??

Or should the Hondata override that???

 

are you sure that it's the Fast Idle Valve and/or the Hondata?

the reason i ask is cause i had a problem like that once and it turned out to be the TPS on the TB. i tried all kinds of things including the IACV, checking for vacuum leaks, MAP sensor and resetting the ECU (stock OBD1 P72). eventually i got to the TPS and that's what the problem was, none of the other sensors or anything.

i'm telling you this just to see if you've checked any of the other possibilities. trying to help you narrow it down and solve your idle problem.

 

Actually, No.

However, when my Idle was all screwed up.... after I let it warm up, I covered up the Fast Idle Valve hole on the inside of the throttle body, and it idled perfectly... at 800RPMs.

So, I figured that:

One... the head gasket I made didn't seal up right, or there is a spot where air is getting through (but i would think that if that was the case, the idle would still surge a little).

Or... since the surging stopped, and the idle is just still a little high, it may have something to do with the fact that the coolent lines are now blocked off.. and collent won't reach the IACV (will it?), so the IACV is throwing off the idle.

I'll see if I can't look into a couple of those suggestions you gave. I'm not TOO worried about it. I'm taking my car down to "sgt" (Steve Sakia at SGT-Racing, see my sig) to get some work done, and I can ask him to look into it. But he is already doing enough work for me, and I just wanted to save him the headache.

But I thanks for the suggestions... I'll look into it.


Anyone else?????

 

when my motor started surging it went from 1500-2500 rpm at full temps and when cold it could go past 3000 rpm. similar to your problem.

i drove it for quite awhile with the IACV disconnected so it would stay around 1400 rpm and not flucuate so much. then finally i figured out it was the TPS, which was one of the last things i suspected.

maybe the gasket you made didn't hold so the problem wasn't fixed. you could try that again before moving on to something else or giving the car to a friend or shop.

BTW where is SGT-Racing? somewhere in Eastern PA?

i'm curious cause i'm from Eastern PA myself but i don't think i've heard of SGT before.

 

Ok... I'll look into that.


I'm afraid SGT-Racing is in Stafford, VA (something like 5 hours from Pittsburgh). I had to take it to a Hondata Dealer to get it hondata tune. And he was one of the closest Hondata Dealers, plus the guy who built the engine for me recommended Steve Sakai. He is a moderator (I think) here on honda-tech. He goes buy "sgt". He's a pretty cool guy, really knows his stuff. His web site is in my sig (but I think it is underconstruction).

Where are in eastern PA are you from?


[Modified by PSU-TEG, 12:30 AM 3/11/2003]


[Modified by PSU-TEG, 12:33 AM 3/11/2003]

 

the Easton, PA area. near Phillipsburg, NJ on the border.

i'm assuming you're from the Penn State University area?
or is that another college with the PSU?

yeah i'm not familiar with Steve Sakai but it sounds like he knows what he's doing.
i think my friend may have mentioned him in conversation not too long ago, something about him doing really good Hondata tuning. i guess that's him then.

hope everything goes well with your motor and you solve this problem. i know it can be annoying to have the idle surging like that.

 

the only reason the IACV needs coolant is to stop it icing up in freezing weatehr...

why not take the end cap of the FITV and make sure that the round plastic thingy is screwed in tight and not loose?

this is another reason for silly idles...

t..

 

Ok, I'll look into that too...

Thanks!