Is it normal for the (lower left) hole in the mouth of the tb to pull a constant vacuum of air, at idle??

Complete tune up, cleaned iacv, egr system, and I don't have any vacuum leaks on any hoses. Idle is at 800rpm, and she runs just fine.

I'm loosing pick up and mpg.

Thanks,
-Shadow-

 

1993, H23A SI 16v dohc.

Inside the throttle body, attached to the intake.....There are 2 holes, T...W...O holes.

_Defined:_

h o'l, n. "A hollow place in any solid body".

_Question:_

Is dat hoe' supose to suck air why de' engine is sittin', wassin' gas at da' stoe bumpen da' muzak fo' no reazon?


T.M.I? Or do you need pix. Pix=(Pictures)

 

so are u asking about the 2 holes on the intake or 2 holes on the throttlebody..? learn to type english dude and maybe we can try to help you out. if there's 2 holes on the throttlebody with nothing attached to it, that will most likely be your fast idle thermo valve.. if its on ur intake, ONE of them should be for the PCV valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shadow29485 &raquo;</TD></TR><TR><TD CLASS="quote"> 1993, H23A SI 16v dohc.

Inside the throttle body, attached to the intake.....There are 2 holes, T...W...O holes.

_Defined:_

h o'l, n. "A hollow place in any solid body".

_Question:_

Is dat hoe' supose to suck air why de' engine is sittin', wassin' gas at da' stoe bumpen da' muzak fo' no reazon?


T.M.I? Or do you need pix. Pix=(Pictures)



</TD></TR></TABLE>

Hahah, WTF?

Might as well go ahead and post a pic of what your talking about...

 

i think he's talking about the hole for the FITV..

I know it should be pulling air when the engine is cold, however i'm not sure about warm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shadow29485 &raquo;</TD></TR><TR><TD CLASS="quote">Is dat hoe' supose to suck air why de' engine is sittin', wassin' gas at da' stoe bumpen da' muzak fo' no reazon?</TD></TR></TABLE>

lol

translated into pure rice, now i know exactly what you're talking about

 

LMAO!

I was being completely sarcastic on the second reply, in my own message, by trying to type into a dialect that anyone/someone would understand these days. He, he

"Hawkze".....I figured you would catch on to it? J/K. After all...your my mentor. J/k lol .
___________________________________________

I'm talking about the holes in the throttle body, connected to the intake.

If you were to take your cai, or oem intake, off, and were looking directly into the tb, you'll see the two holes on the left side of the tb. You guys have an idea right?

Anyways, the lower left port is constantly pulling vacuum, even at idle, 800rpm (NO surge).

I've already switched the iacv, and I'm still pulling vacuum like hell.....

Is this normal??
__________________________________________________ ________
P.S

Don't take my sarcasm to heart, I thought it might have got a better hit that way.

-Shadow-

 

Thanks to Matt, for the pics.

 

If your idle is good (and it sounds like it is) then I wouldn't worry about it.

 

Hawk is right but I only see one IACV port in my TB.



Pirate

 

But it sounds like an F-18 ready to take flight? Even "at idle", like I said.

If it's sucking that much air into the intake, than the air to fuel ratio must be out of wack some how. That's why I'm loosing fuel to milage rate, to only 14 mpg on the hwy. (calculated).

I'm assuming that the ecu may play a huge role in this, even if I'm not throwing any codes, and the engines running fine.

On a full tank, and driving conservitive (shiffting at 3100 max. in each gear to 5th manually) I'm getting around 200 mpg. on a full tank.
__________________________________________________ _______________

NO CODES...

Fuel filter: CHANGED
New plugs: NGK uridiums
New CAI: Incuding K&m filter
Running mobile 1, 100% syn. (no leaks), incl. flush every oil change @ 2.5K. and new o.f..
New dizzy.
New cap. & rotor
New ign. coil
Flushed injectors
High flow cat.
Back flushed coolant, and added Honda 50/50 coolant.
Cleaned egr/egr ports. Also cleaned iacv, and checked vacuum on most of the map sys.

I'm sure that I'm leaving a lot out, but that's what I'm gathering at the moment.


I'm loosing mpg, and suffering a power loss...

Any ideas??

-Shadow-

 

Any vaccum leaks?

Thats the FITV hole

Searching pwns you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shadow29485 &raquo;</TD></TR><TR><TD CLASS="quote">
If it's sucking that much air into the intake, than the air to fuel ratio must be out of wack some how. That's why I'm loosing fuel to milage rate, to only 14 mpg on the hwy. (calculated). </TD></TR></TABLE>

No, sorry. That's not how it works, and if it did, you are saying that you have too much air? That would not use more fuel... Unless you are saying it's sucking in too much air and then compensating by adding more fuel, which would mean the rpms would be much higher.

If your car is getting too much air at idle it's going to rev higher...no way around it. At certain rpms with a certain engine, the engine only moves so much air, you can't change that with holes on the throttle body.

What happens when you plug the hole you think is sucking in too much air?

How are you calculating your MPG?

 

i've had an intake whistle before, and, somehow, backing out the idle screw (adjusting idle up) took care of it. Not sure if that's kosher or not

 

yeah i think one of those holes if for the idle bypass, which is adjusted by the screw on top. the other hole is for the FITV, controls the cold idle. i would say dont worry about it unless your idle is ridiculous. its pretty normal. mine sounds more like an f22 than an f18 though, but the intake makes some nice sucking noises at idle. if you really wanna get rid of the sound, tighten up the screw up top.

 

If I turn the ia screw down, it slows the engine to almost 175-200rpm, where she shakes and shutters, almost to cut off, and the vacuum stops from the fitv hole.

With the car warmed up, the lower port is still pulling vacuum, which indicates a bad fitv, or leakage through the fitv, right?

I've already taken the fitv off and tighted the plastic disk....It's super tight.

The weird part is, when I plug that lower hole, when the engine is running, and warm, it's still pulling a small amount of air, just enough for a slight vacuum.

This port, (for the fitv) or hole, should not pull any air unless the engine is warming up, or unless I hit the throttle.....Correct?

I'm thinking of just bypassing the damn thing.....The fitv that is. I'm going to check the faqs now......
__________________________________________________ ____________

 

Hawkz,

Thanks, you made me realize the obvious.

As for calculating the mpg. I fill her up and write down what the pump says in capacity of what I've just put in the tank from empty, than I divide it to what the milage is back to empty.

I'm tired as hell, so I hope it make sence.

Thanks man.......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shadow29485 &raquo;</TD></TR><TR><TD CLASS="quote">Hawkz,

Thanks, you made me realize the obvious.

As for calculating the mpg. I fill her up and write down what the pump says in capacity of what I've just put in the tank from empty, than I divide it to what the milage is back to empty.

I'm tired as hell, so I hope it make sence.

Thanks man.......

</TD></TR></TABLE>

Here's what you do to calculate MPG:

-Top off the tank and reset the trip meter to 0.
-Drive around for a few days
-Return to a gas station and top of the tank again. Record the exact amount of gallon you added
-Record what the trip meter reads now (how far you drove since the last fill up)
-Divide how many miles you drove by how many gallons you added



Maybe that was what you said