throttle body question

[outkastracing]

alright so my question is i just put a new intake manifold on well theres two coolant lines that go to the throttle body is there a reason those are there or can i just route the water back the way it was coming just complete the circle with out the throttle body?

 

[1992awdlaser]

Those are part of the idle control devices. You can loop a line if you want. One goes to the water pipe and the other goes to the back of the thermotat housing. So, you would have to block those off also.

 

[outkastracing]

i realize that but is it going to hurt me if i dont do it is what im asking idle control what does it exactly do?

 

[tbonitz301]

The coolant melts a wax pellet when it heats up. It is located in the FIAV

 

[Laysher91]

^^^^ Yup. The FIAV allows more air to flow to the engine during cold starts through a passage that has a wax pellet in it. Once the engine is up to operating temp, the coolant in those two lines melts the wax pellet closing the airway. If you will not have cold starts, you are safe to eliminate the lines or block off the FIAV with a plate.

 

[Avionixx]

You're going to need a block off plate for the FIAV so you can render those passages useless. That wax pellet is going to take forever to heat up and close that extra air passage without hot coolant going through it. If you don't mind an inconsistent idle, then by all means just loop the coolant lines.

 

[Burnett03]

Those are part of the idle control devices. You can loop a line if you want. .

No you can't.. The fiav is a wax pellet that gets melted when the coolant is hot to lower the idle back down.. You can't just loop the lines or that wax pellet will never melt.. You must block the fiav.

 

[1992awdlaser]

No you can't.. The fiav is a wax pellet that gets melted when the coolant is hot to lower the idle back down.. You can't just loop the lines or that wax pellet will never melt.. You must block the fiav.

I know how it works. He asked "is there a reason those are there" and "can i just route the water back the way it was coming"

I answered both of those questions. So I didn't mention he will have idle problems. Why? Two reason 1. He will have idle problems whether he uses a block off plate or not. 2. The search function works very good on this site. I bet he would have found the answer on the first page of searches in less than 2 minutes. They got to be willing to do a little bit of work (and it's not much work).

 

[outkastracing]

I know how it works. He asked "is there a reason those are there" and "can i just route the water back the way it was coming"

I answered both of those questions. So I didn't mention he will have idle problems. Why? Two reason 1. He will have idle problems whether he uses a block off plate or not. 2. The search function works very good on this site. I bet he would have found the answer on the first page of searches in less than 2 minutes. They got to be willing to do a little bit of work (and it's not much work).

actually to be exact i did search this and found nothing thank you im not new to the dsm site so i know to search! but ive also never delt with this before so im asking! so what i got out of the bickering is yes i can do it but ill have a inconstant idle!

 

[1992awdlaser]

actually to be exact i did search this and found nothing thank you

Really

http://www.dsmtuners.com/forums/newbie-forum/284575-idle-fiav-throttle-body-coolant-lines.html
http://www.dsmtuners.com/forums/bolt-tech/280586-fiav-tb-coolant-bypass-lines.html
http://www.dsmtuners.com/forums/bolt-tech/111373-anybody-else-bypass-coolant-lines-throtle-body.html
http://www.dsmtuners.com/forums/bolt-tech/116353-coolant-lines-tb.html
http://www.dsmtuners.com/forums/newbie-forum/77742-taking-coolant-lines-off-throttlebody.html

 

[daren_p]

I know a bunch of guys that have blocked of the FIAV & some the ISC as well & they still have a perfect idle, so yes you can eliminate them. Though depending on your climate you may need to keep your foot on the gas abit to prevent stalling when first starting up. Others say they get away with just letting the car sit & idle for a couple min before they drive, to prevent stalling. Removing/blocking the FIAV shouldn't cause inconsistant idle, as mentioned above, it will just remove the increased idle rpms when the cars first warming up.

 

[Burnett03]

I know how it works. He asked "is there a reason those are there" and "can i just route the water back the way it was coming"

I answered both of those questions. So I didn't mention he will have idle problems. Why? Two reason 1. He will have idle problems whether he uses a block off plate or not. 2. The search function works very good on this site. I bet he would have found the answer on the first page of searches in less than 2 minutes. They got to be willing to do a little bit of work (and it's not much work).

See once again you are posting incorrect information.. If you use a blockoff plate you will not have idle problems.. I block my fiav and i idle better than before.. Using the search function doesn't do jack if you have people like you posting incorrect info.

 

[1992awdlaser]

See once again you are posting incorrect information.. If you use a blockoff plate you will not have idle problems.. I block my fiav and i idle better than before.. Using the search function doesn't do jack if you have people like you posting incorrect info.

Why do you think a block off plate made mine and many others idle worse? I ONLY POST FROM EXPERIANCE. Nothing I say is misinformation. If you want to make your way to NC I will prove it can mess up idle. Other wise don't say I am wrong. Did you see the links I posted to prove that this question could be answered by searching?

 

[andy4g63]

If he /outcastracing / wants to bypass coolant lines to TB, he needs to get FIAV Bypass, not blockoff plate. To get a block off plate, he''ll need to get rid of ISC.

 

[ChunkyLover53]

I have eliminated the ISC and FIAV. What daren posted is true about my car. At startup I have to keep on the gas just a little but, but when warm it idles excelent .

 

[turboglenn]

My lines are disconeected, and i just tuned around the idle problem now my car runs fine. If you have tuning capabilities you will be able to get by with it and not have to do anything special, except loop the lines with one of the hoses.

Sure i deal with an inconsistant idle at times, but then again my TB needs rebuilt anyway (seals are bad) it will however make cold starts and the first 30 seconds or minute of running a little rough/difficult. If no one believes me i can take a picture and a video and put it up, people read all kinds of things and then think it's "the only way" when if they'd just try some stuff themselves instead of taking everything on teh 'net as "the gospel" those people would probably discover a lot of cool things about their cars.

 

[outkastracing]

so does anyone sell this block off plate or do i need to make one??? and what else will i need... thanks for the info

 

[1992awdlaser]

JM Fabrications
JM Fabrications

The top link is if you want to keep the isc.

 

[lov4godgst]

I have the JM FAbrications FIAV blockoff and am going to disconnect and recirculate the two coolant lines back into themselves, that are running to the lower side of the throttle body.
But what about the 4 coolant lines on top? I haven't found anything specific about those.

91 TSI AWD

 

[1992awdlaser]

I have the JM FAbrications FIAV blockoff and am going to disconnect and recirculate the two coolant lines back into themselves, that are running to the lower side of the throttle body.
But what about the 4 coolant lines on top? I haven't found anything specific about those.

91 TSI AWD

Those are vacuum lines. Search eliminate vacuum and you will find a lot of threads about it.

 

[spooln4fun]

http://www.dsmtuners.com/forums/art...-speed-shop-vacuum-diagram-removal-1g-2g.html

There is the link for the vacuum line removal diagram!

ps just installed a block off plate my self, and it does have some rough idle at the start of the car when its cold but after it gets warming up it runs great

 

[xveganxcowboyx]

I've heard the best results come from using the bypass plate. People seem to like having the lines blocked off, but retaining the function if the ISC. I personally have the full block off and don't mind it, but it is a little rough to start/idle in the cold. Above 50 or 60 degrees it's perfectly fine. Either way, once it's warm all is well.

Tuning method will have some effect as well, or at least it did for me. My block off gave me more problems when I was only running a MAFT. Idle with the block off was more erratic and less stable. Just something to consider when deciding what to go with.