Kia Forte Turbo Forum banner
1 - 14 of 14 Posts

·
Registered
Joined
·
481 Posts
Discussion Starter · #1 ·
The other day, some of you may have seen that I did not know about turning off the stabiity control. I immediatley went out and dissabled it. Here is what I found.
1. The car is wicked fast and fun again.
2. My mpg went from 20-21mpg to 26mpg!
3. I am able to reach 50 mph before exiting the intersection. :D

Here is how to do it in case you don't know

1. Press and hold the traction control button (located by the "eco" button)
2. Wait for the car to chime and a message on the info center to say "Traction and Stability Control Disabled".
 

·
Registered
Joined
·
535 Posts
The other day, some of you may have seen that I did not know about turning off the stabiity control. I immediatley went out and dissabled it. Here is what I found.
1. The car is wicked fast and fun again.
2. My mpg went from 20-21mpg to 26mpg!
3. I am able to reach 50 mph before exiting the intersection. :D

Here is how to do it in case you don't know

1. Press and hold the traction control button (located by the "eco" button)
2. Wait for the car to chime and a message on the info center to say "Traction and Stability Control Disabled".
I too learned this just the other day and man I have to say I feel like I put a mod on my car. I mostly notice it in lower gears. The car doesn't stutter like it used to. The only problem I have now is that under WOT it sounds like my BOV is "bouncing" off the boost threshold or something. This is completely unrelated to the TC button thing.

Can someone enlighten me on what this is and if it is normal?
 

·
Premium Member
Joined
·
3,021 Posts
What the system does when on it limits the amount of torque you get to the wheels when on take off. It will also limit throttle input when cornering hard to. So if you leave it on and hit a corner really hard and put your foot to the floor it is supposed to cut the power till the car goes level again.

I turn mine off as soon as I start the car. Did it from day 1 lol
 

·
Premium Member
Joined
·
3,021 Posts
I too learned this just the other day and man I have to say I feel like I put a mod on my car. I mostly notice it in lower gears. The car doesn't stutter like it used to. The only problem I have now is that under WOT it sounds like my BOV is "bouncing" off the boost threshold or something. This is completely unrelated to the TC button thing.

Can someone enlighten me on what this is and if it is normal?
If your bov is constantly going off under wot it's the computer opening it to keep the psi at the stock levels.
 

·
Registered
Joined
·
981 Posts
Mine did that with 4000 miles and it was a bad diaphragm on the RCV (BOV). All you need to do to test it is use a piece of vacuum line to the BOV and either a vacuum pump or your mouth and check to see if it holds a vacuum.
 

·
Premium Member
Joined
·
3,021 Posts
Or take it off and check for rips
 

·
Registered
Joined
·
535 Posts
If your bov is constantly going off under wot it's the computer opening it to keep the psi at the stock levels.
How is the computer opening the BOV? Isn't the BOV operated off of pressure and a spring?
 
  • Like
Reactions: Forte5

·
Registered
Joined
·
981 Posts
How is the computer opening the BOV? Isn't the BOV operated off of pressure and a spring?
ECU controls the vacuum going to the BOV with a solenoid mounted right near the IC
 

·
Registered
Joined
·
981 Posts
In normal run mode the solenoid is closed allowing the boost line from the top of the IC to go straight to the BOV to hold pressure. When you shift, decel or it needs to limit it will actuate the solenoid closing off boost pressure and allowing a vacuum source to be applied. Built right on the side of the intake is a rectangular box with a single line attached. That box never sees boost and has a one way valve so it can hold a vacuum even while you are at WOT so at anytime the ECU can purge pressure when needed.
 

·
Registered
Joined
·
481 Posts
Discussion Starter · #10 ·
I have spread my knowledge to my "ex" girlfriend's (depends on her mood) Chevy Cruze. She's amazed. I cant believe after all the time I have been working on cars and in dealerships I didn't know this.... Mind=BLOWN...
P.S. Kia, if a man wants to gun it in a corner.... let him... If he lives it was meant to be, if not, it wasn't meant to be.
 

·
Registered
Joined
·
535 Posts
In normal run mode the solenoid is closed allowing the boost line from the top of the IC to go straight to the BOV to hold pressure. When you shift, decel or it needs to limit it will actuate the solenoid closing off boost pressure and allowing a vacuum source to be applied. Built right on the side of the intake is a rectangular box with a single line attached. That box never sees boost and has a one way valve so it can hold a vacuum even while you are at WOT so at anytime the ECU can purge pressure when needed.
Oh ok I thought that was what the Wastegate did as far as opening at the boost threshold to allow the pressure to stay consistent under wot. Please feel free to drop more knowledge on this subject if you have it!
 

·
Registered
Joined
·
981 Posts
Oh ok I thought that was what the Wastegate did as far as opening at the boost threshold to allow the pressure to stay consistent under wot. Please feel free to drop more knowledge on this subject if you have it!
The ECU will use the actuator for the wastegate for some control to a point but default is 14 psi for the actuator so the ECU can't use that to drop pressure below that point. So the only other option it has is to use the BOV
 

·
Registered
Joined
·
535 Posts
The ECU will use the actuator for the wastegate for some control to a point but default is 14 psi for the actuator so the ECU can't use that to drop pressure below that point. So the only other option it has is to use the BOV
What types of conditions cause the ecu to need to drop below 14psi? Sorry. I like having people to ask these tedious types of questions. I appreciate all of the knowledge.
 

·
Registered
Joined
·
534 Posts
I have not seen the maps on this ecu, but there is usually a map for altitude and air temp. Some of those (to high of an altitude or to high of intake air temp might need to drop the boost below that point.

Another reason is if the w/g gets stuck the bov will still be able to regulate boost and prevent the motor from blowing. Not saying these are programmed in, but those are some possible uses ;)
 
1 - 14 of 14 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top