joelmatt89

So after i fixed my vacuum leak the idle is running steady accept for when i start it. When i start it basically it will just idle down to the point of dying and will do it for about 5 minutes if i let off the gas it will die. But after five minutes it will idle at about 300 and then after ten minutes it will idle fine at about 700-800. I have cleaned the iacv and fitv really well. But i did notice on a thread I searched someone mentioned something about adjusting that nylon fitting inside fitv that has the brass thing coming out the center. I didn't know that can be adjusted; mine is just as tight as it would go, be cause that is how it was when I took it apart. So what does that thing do it seems like that could be my problem. But if this isn't what is causing it, what else do you think could be causing it to do that.

On a side note i am not sure if these things could be related. But today when i was driving it after like 15 minutes i pulled into a parking lot and the idle dropped really low then the radio along with the other electronics turned off although the car stayed running. It was weird because my tach wasn't reading at all until i revved the engine. I parked the car and then about an hour later i left and it hasn't done that since. It was raining so maybe it was just an electrical thing but i thought i should mention it as well.

EDIT : I fixed this problem by adjusting the fitv, i think alot of people have this same problem and never try adjusting the nylon fitting in there look at the third picture from the bottom in this link he explains it in the caption underneath https://honda-tech.com/forums/acura-integra-6/%2A%2A%2A-how-%2A%2A%2A-clean-your-fitv-aka-fast-idle-thermo-valve-1564019/

joelmatt89

bump

Former User

I agree with your focus on the FITV, as it functions to maintain the proper cold idle. I don't know how to modify it. Test whether the FITV port in the throttle body fails to pull air when the engine is cold. If so, maybe you should consider replacing it with a new or used one.

joelmatt89

those are the two holes in the throttle body right? when i put my fingers over those two holes the engine dies so it seems like they are both suctioning properly correct me if i am wrong. The weird thing is that throttle body looks like it is brand new when i took it apart to clean it there wasn't even a bit of junk on it.

Edit: I just took a closer look at this thread https://honda-tech.com/forums/showthread.php?t=1564019 and somehow i completely missed the part that said if your car is idling too low adjust that nylon thing in the fitv out, apparently that changes the cold idle speed. Man how did i miss that before. That seems really weird to have an idle adjustment like that, that is so hard to get to you would think they would have made a way to adjust it without taking it apart. Well hopefully that will fix my problem it seems like it should since mine is turned all the way in. That makes perfect sense though because turning it out would release pressure off the spring allowing more air to flow through.

Former User

I guess my question is: Why do you have a throttle body with an FITV on a B16a2 engine?

joelmatt89

yeah i was wondering that myself when i was looking for the tb gasket i realized it is the throttle body from the car (93 ex), i am not sure why the guy would used that. But I adjusted the vinyl thing in the fitv and it is idling great now both cold and warm. This car is classic the second one thing gets fixed something else pops up. I mentioned before my brakes were pretty bad. Then today they suddenly went from bearable to extremely dangerous going about 30 mph it takes me about 100 ft to stop with the brake to the floor. I am on spring break so i plan on trying to tackle that this week. What do you recommend i know i am going to need to replace the rear cylinders but i am pretty sure that the master cylinder might be to blame as well. I mean i just bled the front brakes two weeks ago so i don't see how they could get that bad that quick. Are there any good write ups for rebuilding the master cylinder i will search in a bit but if someone has one bookmarked or something that would save me alot of trouble.

Former User

That's great news about the FITV and the now normal idle speed. What exactly did you do to the FITV?

Brakes:
Are you loosing fluid? Are you sure that you properly bled the hydraulic system? I don't know of a master cylinder rebuild link but, if yours is indeed defective, I think you should just replace it. Might be much easier in the end.

joelmatt89

yeah i think i might just replace it i see you can get rebuilt ones for pretty cheap. Know that i think about it, it may be leaking i remember seeing alot of oily stuff along the bottom of the car when i put the exhaust on. But at that time it didn't really seem that pressing because i could tell it wasn't engine oil, coolant, or gas. It turns out it may just be the next most important fluid on the car. I was reading a write up and someone said that if you change you fluid or bleed your brakes and about two weeks later your brakes suddenly lose all pressure it means that your seals had absorbed water and then shrunk when the fluid was changed. So that seems to be my exact case.

But as far adjusting the fitv if you look at the link i put on my second to last post it is the third picture from the bottom the guy explains you turn the nylon thing out to increase the cold idle speed. It is kind of hard to explain cause i don't know what it is called but it's really obvious if you look at his pic. Ha it was fun adjusting it at midnight outside with a tornadoe warning just passed so there was like gale force winds.

BTW What do you think about the end of the first post on this page is it possible all the electronics randomly went out because of the idle dropping too low. I mean it has never happened before and it has been in much worse rain. I am just curious and really hope it doesn't happen again.

Former User

Definitely try to pinpoint the source of the brake fluid leak as it will likely be critical to fixing the brake problem. Note that the clutch hydraulic system also uses brake fluid.

joelmatt89

yeah i will try to see where it is coming from. I might have just been completely imagining it i mean none of the fluids have gone down, but ill get under there tomorrow.

I was thinkin about it I see so many people who clean there fitv and then say their idle is too high or low so they assume the fitv is bad. Then when they get a different one it fixes the problem when in reality there problem was probable that they tightened their fitv too much/little and the one they got had never been messed with.

Former User

I think you are right. I hope people find and read this thread. You may want to edit your thread title to mention that the solution was an FITV adjustment.

joelmatt89

i didn't even know you could edit thread titles how do i do that

Former User

PM Trustdestruction here or at HCF. I think he mentioned knowing how to do it. I believe it involves the advanced editing functions.

joelmatt89

yeah i just did it you go to your first post and then go advanced editing and you simply type in you new title