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K Series Performance => Engine and Drivetrain Performance => Topic started by: exelr8 on April 29, 2009, 08:10:40 PM



Title: Throttle body bypass
Post by: exelr8 on April 29, 2009, 08:10:40 PM
Does anyone know where the TB Bypass DIY is or if it has been brought over? I searched for it but no luck


Title: Re: Throttle body bypass
Post by: timot_one on April 29, 2009, 11:11:16 PM
I think the old forum is now gone.  I forgot what it is, but it's pretty easy to pull off.


Title: Re: Throttle body bypass
Post by: exelr8 on April 29, 2009, 11:21:37 PM
Does the Fact that I am DBW make a difference? I re-attempted it again today and ended up confused like no other


Title: Re: Throttle body bypass
Post by: Icebox on April 30, 2009, 08:40:52 AM
http://www.k-series.com/tech_document.php?id=33


Title: Re: Throttle body bypass
Post by: cna on April 30, 2009, 01:39:29 PM
Do you have the i4 or v6? I did it on my v6 and all I had to do was disconnect the stock lines to the throttle body and connected them to each other using a hose  mender


Title: Re: Throttle body bypass
Post by: Icebox on April 30, 2009, 01:44:39 PM
based on his signature, im guessing i4.


Title: Re: Throttle body bypass
Post by: b_beau_09 on April 30, 2009, 02:46:42 PM
what does this actually do for our engines? (i have a v6)


Title: Re: Throttle body bypass
Post by: Icebox on April 30, 2009, 03:01:15 PM
the only difference is that it may allow your motor to run a little cooler. i dont think it actually adds any power.


Title: Re: Throttle body bypass
Post by: cna on April 30, 2009, 03:32:32 PM
I felt a bit more respond from my acceleration and a smoother ride on hot days the car takes a little longer to warm up but never had a problem with it easiest mod I have done


Title: Re: Throttle body bypass
Post by: fabulous010 on May 01, 2009, 10:13:52 AM
did you have to drain the coolant at alll?


Title: Re: Throttle body bypass
Post by: cna on May 01, 2009, 10:24:16 AM
Nope didt have to drain any coolant i took a plastic cup and caught the little bit that fell and just re added it


Title: Re: Throttle body bypass
Post by: Icebox on May 01, 2009, 10:28:14 AM
very wise


Title: Re: Throttle body bypass
Post by: exelr8 on May 03, 2009, 05:50:06 PM
well, turns out the tb lines were not the cause of my car overheating... For some odd reason the thermostat decided to go bad


Title: Re: Throttle body bypass
Post by: Skippy on May 03, 2009, 06:47:40 PM
For anybody wishing to do this modification, a few words of caution...The coolant lines running through the throttle body serve an important purpose.  They provide essential heat to the Idle Air Control Valve to keep it from sticking in cold weather.  If you remove the coolant loop from the IACV, you run the risk of having the valve stick on cold days.  This will make your idle fluctuate and the car will sound very ill.  You may attempt this mod if you live in a no-snow state, but I still would not recommend it.  I have not done this mod simply because I don't want to get caught with my pants down when the cold weather comes around..


Title: Re: Throttle body bypass
Post by: NWINNIE34 on May 03, 2009, 08:01:48 PM
i almost did this "mod" or whatever over the weekend when i installed oil catch can
didnt wanna deal with it

i did shorten the coolant line due to the disconnection of the engine vent hose from the CAI tube connection...didnt make ssense to keep that 4 way piece involved in the equation


Title: Re: Throttle body bypass
Post by: exelr8 on May 03, 2009, 11:07:09 PM
Quote from: "Skippy"
For anybody wishing to do this modification, a few words of caution...The coolant lines running through the throttle body serve an important purpose.  They provide essential heat to the Idle Air Control Valve to keep it from sticking in cold weather.  If you remove the coolant loop from the IACV, you run the risk of having the valve stick on cold days.  This will make your idle fluctuate and the car will sound very ill.  You may attempt this mod if you live in a no-snow state, but I still would not recommend it.  I have not done this mod simply because I don't want to get caught with my pants down when the cold weather comes around..

I just restored it to stock and said to hell with it, Where I live we hardly get snow but this year has been a bit wierd we actually got snow like 4 times this year


Title: Re: Throttle body bypass
Post by: cna on May 03, 2009, 11:21:15 PM
i went winter with mines done i had no problem just let the car warm up and you should be good to go


Title: Re: Throttle body bypass
Post by: exelr8 on May 03, 2009, 11:51:34 PM
hell, I am still trying to figure out the difference in the coolant lines for Drive by wire like my application


Title: Re: Throttle body bypass
Post by: timot_one on May 12, 2009, 03:20:36 PM
This should be in a different forum.  Try to post in the appropriate forum next time.


Title: Re: Throttle body bypass
Post by: fabulous010 on May 14, 2009, 01:04:25 AM
Quote from: "Skippy"
For anybody wishing to do this modification, a few words of caution...The coolant lines running through the throttle body serve an important purpose.  They provide essential heat to the Idle Air Control Valve to keep it from sticking in cold weather.  If you remove the coolant loop from the IACV, you run the risk of having the valve stick on cold days.  This will make your idle fluctuate and the car will sound very ill.  You may attempt this mod if you live in a no-snow state, but I still would not recommend it.  I have not done this mod simply because I don't want to get caught with my pants down when the cold weather comes around..
seems like its the simplest mod to do. all the coolant does is keep the throttle body heated up to prevent freezing or sticking in colder weather. my friend had this done on his 93 civic. the car was harder to start in the winter and he did have to give it more time for the engine to heat up to allow the TB to heat up a bit too. but when he pressed on the throttle it was like nothin else. the TB kept pretty cool and the car ran great! i dont think it should take you more than 20 mins the second time around. so i think its safe to have this done for summer driving.then when the cold comes lurking around just connect back to head up the TB during winter. You dont need cooling for the TB during summer. if anything you want to keep it cooler :grin:


Title: Re: Throttle body bypass
Post by: Skippy on May 14, 2009, 08:33:27 AM
for the summer months it's fine.  I have had people ask me to diagnose their cars during winter time because of an erratic idle and they've all said that they bypassed the coolant lines.  Those coolant lines do not heat the throttle body, they heat the Idle Air Control Valve.  Heating the throttle body is just a side effect.


Title: Re: Throttle body bypass
Post by: fabulous010 on May 14, 2009, 11:35:26 AM
Quote from: "Skippy"
for the summer months it's fine.  I have had people ask me to diagnose their cars during winter time because of an erratic idle and they've all said that they bypassed the coolant lines.  Those coolant lines do not heat the throttle body, they heat the Idle Air Control Valve.  Heating the throttle body is just a side effect.
would this have any long term affects on the idle air control valve, thermostat or anything for that matter, even if just done for the summer months?


Title: Re: Throttle body bypass
Post by: Skippy on May 15, 2009, 10:44:35 AM
If the modification is performed correctly and it is only for the summer months, it should not pose any harm to the IACV or related equipment.  I would highly recommend making a mental note to yourself however that as soon as the weather starts to get chilly that you reverse the modification until the weather becomes favorable again.


Title: Re: Throttle body bypass
Post by: AV6NHBP6SPD on July 09, 2009, 05:57:02 PM
yeah had it done when installed spacer kit. i guess ill chance when winter comes around


Title: Re: Throttle body bypass
Post by: Jeff Likes Bagels on July 09, 2009, 06:03:46 PM
as long as you let your car warm up when you first turn it on, i don't think there should be a problem. then again, we don't get winters in florida, so what do i know. :P


Title: Re: Throttle body bypass
Post by: fabulous010 on July 12, 2009, 09:44:04 AM
jeff give us an update dude... how is this by pass working for you? what are the differences you have noticed.


Title: Re: Throttle body bypass
Post by: Jeff Likes Bagels on July 12, 2009, 10:04:54 AM
Well, I've noticed a slight increase in throttle response... that's about it. My advice is that if you're willing to do a free mod with the potential risk of leaking coolant all over the place like I did, then go ahead. If you'd rather not have to potentially clean up that mess, and refill the coolant, then don't do it. The main reason I did it is because I'm obsessed with every little performance gain, lol.


Title: Re: Throttle body bypass
Post by: fabulous010 on July 12, 2009, 10:19:39 AM
same here. but dont have the money for big gains. hahaha thanx. i needed something to do today.


Title: Re: Throttle body bypass
Post by: Jeff Likes Bagels on July 12, 2009, 12:13:29 PM
Yeah, now that I've done it, I'm satisfied. It's just the evil of having to do it, lol.

I never took off my intake; it was fairly easy to get to it. Just be careful, though. When you pull off the hose from the black metal tube that's under the IM cover a bit, it's going to leak coolant all over the fucking place. So be ready, and have the bypass hose ready to slip onto it.

Good luck. I'd recommend grabbing a bunch of towels (I couldn't find any in my house, AND we were out of paper towels, so i had to use NAPKINS lol).


Title: Re: Throttle body bypass
Post by: fabulous010 on July 12, 2009, 09:18:45 PM
i didnt end up doing it. i spent the day with the GF so i didnt want to bore her with that stuff. but i did look at the job and picked up the parts.
so just to make sure it is both lines close to eachother at the bottom of the TB?


Title: Re: Throttle body bypass
Post by: Jeff Likes Bagels on July 13, 2009, 09:07:16 AM
Here's what I did:

Before
(http://img195.imageshack.us/img195/8789/tbbypassbefore.jpg)

After
(http://img13.imageshack.us/img13/5797/tbbypassafter.jpg)

Makes it a lot cleaner bypass. Whether or not your heater hose will be as long as mine, I'm not sure. Mine came from K&N when I got my intake, but I never cut it down because it wasn't really hurting anything. That's how I got it to reach. I couldn't get any good shots of under the throttle body, but you basically want to take the short hose that goes from the black coolant pipe on the left of the intake to the TB, and loop it through the TB.

I hope that helps some. And just so you can be prepared, when you take the heater hose off the TB, it's going to leak a little bit of coolant... but when you take that little hose off the black coolant line (if you do it my way), be prepared for a steady flow of coolant to leak out. :P


Title: Re: Throttle body bypass
Post by: Heckler on July 13, 2009, 04:10:25 PM
Quote from: "Skippy"
For anybody wishing to do this modification, a few words of caution...The coolant lines running through the throttle body serve an important purpose.  They provide essential heat to the Idle Air Control Valve to keep it from sticking in cold weather.  If you remove the coolant loop from the IACV, you run the risk of having the valve stick on cold days.  This will make your idle fluctuate and the car will sound very ill.  You may attempt this mod if you live in a no-snow state, but I still would not recommend it.  I have not done this mod simply because I don't want to get caught with my pants down when the cold weather comes around..

Skip, there isn't any cold weather in flori-duh  :roll:


Title: Re: Throttle body bypass
Post by: cd5myeleanor on August 04, 2015, 09:04:59 PM
Georgia weather is quite extreme and dramatic at times...
I'm not entirely sure if doing this will yield positive results if the winter is cold....


Title: Re: Throttle body bypass
Post by: CrackerTeg on August 05, 2015, 08:17:56 AM
I had done this years ago when I was in NY, ran through a few years in Miami and another couple years in CT. No ill effects on my end.


Title: Re: Throttle body bypass
Post by: timot_one on August 05, 2015, 08:41:20 AM
I've had this bypass done for a long time on different variations of my motor, living in MA and OH without any issues.


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