B18B1 LS 4 door Integra

Just recently I asked a question here about how I could remedy my 3k idle problem. Since then, I changed all the gaskets, cleaned every orfice of the intake manifold and now its idling at 5000?????!!!? I'm about to give up on this motor but I want to give it one last shot.

I been recommed to cover the throttle body and if it still runs, its a leak. And if it dies, it could be in the IAC, or map sensor. With further testing, the car dies the moment I cover the throttle... which lead me to believe one of the sensors is bad. Well, I was also told if I unplug them, the idle should go back down but bounce around 500-800. After unplugging both sensor's it still idles around 2000-3000. BACK TO SQUARE ONE!

Can anyone else give some healthy feed back? What else to check? What else it could be? I'm starting to think ECU since thats the only thing that I could think of. Any help would be greatly appreciated.

 

wow if it was a b18c i'd say u like to idle in vtec? But seeing that it's a b18b that's pretty high in the revs for idle. Anyways, I've never seen an idle rev that high, U getting any check engine lights? U sure ur throttle cable isn't really too tight? Yeah u could try a differen't ecu if u can get ur hands on one. When did this problem all start, what were u doing, if anything?

 

try to adjust the idle screw on the throttle body...

 

well actually we bought the car like that, and it also had a bad head gasket. We thought by changing ALL of the gaskets that it might remedy it. Well, i guess not. I also had to redo a valve adjustment because we took all the rockers out to take the head off but didn't put them back in the same place. I would say i still need to do an adjustment due to alot of head noise.

 

idle screw??? Didn't know such thing exisited? I will check that when I get home tonight. Thanks so much!

 

yea, its on top, you should see it no problem

 

awesome, thanks again!

 

idle screw is the cable that connects to the throttle when you press the gas. 5k rpm that is crazy!!!

 

What year is your car?

Four things could affect your idle:
IACV
FITV (if it has it)
Idle screw (a bleed screw on the throttle body)
Throttle plate not closing (sticking throttle cable or the throttle adjustment screw not adjusted properly)

 

the car is a 94 LS

I've check the trottle cable a million times. I have so much slack on there now, theres no way that keeping it open.

I've hear tapping the IACV works too. I'm going to try that and find that bleeder screw.

 

no, its the distributor. the insides are shorting and frying.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CeReal &raquo;</TD></TR><TR><TD CLASS="quote">no, its the distributor. the insides are shorting and frying.</TD></TR></TABLE>

And where would the fuel and air be coming from to sustain this 5000 RPM idle?

 

oh you mean you idle steadly at 500? your fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CeReal &raquo;</TD></TR><TR><TD CLASS="quote">oh you mean you idle steadly at 500? your fine.</TD></TR></TABLE>

Naw man he means 5000 rpms lol..

Anyway, Id check the idle air control valve, or pinch a few vaccum hoses to see if it makes it better. Also are you running the right trottle body on the right manifold?

 

yes, its not a typeo. 5000 is correct.

I did what you guys recommended.

First off, the screw is stripped in there. Its almost as if its screwed all the way tight in there. I'll have to drill and tap to get it out.

Second, I covered both holes in the TB and that made it do down alot! Does anyone know which one is suppose to be closed? I'm assuming the hole to the IACV should be open a little bit.

Again, honda-tech has been a great help!

 

Eithe the IACV or the FITV is sticking. You can try to spray carburetor cleaner into the TB hole to clean the offending valve. My guess is that the top hole is for the IACV and the bottom is for the FITV.

 

It is for sure the FIV(fast idle valve). I have had that problem before. You can do one of two things, get a throttlebody from a 98-01 LS or get a new FIV from the dealer. I got mine from A&H motorsports http://ahmotor.com/index.html.

The way to check if the FIV is the problem, is to put a finger over the hole in the throttlebody. The hole is before the throttle plate. If the idle goes down, there is your problem.

 

There are two holes: one for the IACV and one for the FITV.



Here is a rebuild thread for the FITV.

https://honda-tech.com/zerothread?id=699787

 

The one closer to the bottom. Thanks for the pic. The one on top allows the map sensor to read.

 

mines dose that too. but only if say i smashed on it for a while but after a while it gose back down.

 

ya listen to them, tap on the thing, and when it break replace it. square one.

or if your seriously thinking you can get the help over ht, i really think you should replace your distributor man.

i mean i forgot, how exactly did this idle problem happen? really.

Cereal

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hulkdon1 &raquo;</TD></TR><TR><TD CLASS="quote">The one closer to the bottom. Thanks for the pic. The one on top allows the map sensor to read.</TD></TR></TABLE>

The map sensor reads from behind the throtle plate, other wise it would measure atmospheric pressure instead of the manifold pressure. The two larger holes are for the IACV and the FITV. I think that tiny hole at the top is for the idle bleed screw.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CeReal &raquo;</TD></TR><TR><TD CLASS="quote">or if your seriously thinking you can get the help over ht, i really think you should replace your distributor man.</TD></TR></TABLE>

Do you have a distributor fixation? The OP has excess air entering the intake manifold which is causing a high idle. When he blocked the hole for the FITV, the idle dropped because the excess air entering the IM was eliminated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">
Do you have a distributor fixation? The OP has excess air entering the intake manifold which is causing a high idle. When he blocked the hole for the FITV, the idle dropped because the excess air entering the IM was eliminated.</TD></TR></TABLE>

No, it's the magical distributor problem. It forces air and fuel into the intake.

All the distributor does is "distribute" spark. It is run off the cam. How would that effect high idle?

 

Thanks so much Dogg! I'm going to try this later when I get home. I wish there was a way to fix the IACV. I'm hoping this will be it.

 

CeReal, I'm open to any suggestions.

If your refering to my timing and that it might be too advanced? That's the only thing I can think of.

I've already tested the throttle body holes by placing my finger on them, and sure enough all the "vacume" was coming from there. Once I did that, the idle went down... almost to the point of the car dying, but its a good start.