|
||||||
| Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
 |
|
|
Thread Tools | Search this Thread |
06-26-2016, 07:11 AM
|
#1 |
|
Senior Member
Join Date: Aug 2012
Drives: '13 SSM BRZ Limited 6MT
Location: Orange County, CA
Posts: 1,067
Thanks: 593
Thanked 198 Times in 137 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Is the butterfly valve in the throttle body supposed to be closed shut?
I had high negative LTFT (-10 to -15%) on idle and off throttle for a while when I had my Perrin CAI installed. Also had rpm dips when I came up to a stop that would blink off my DRL LEDs. But now it's back to normal (positive 2-5%) with my stock airbox installed.
During the swap, I noticed the butterfly valve in the throttle body was slightly open. Picture is attached. Is this normal? http://imgur.com/cFZvyWk |
|
|
|
06-26-2016, 11:09 AM
|
#2 |
|
Senior Member
Join Date: Jan 2014
Drives: '13 Argento FR-S (Sold)
Location: Ontario
Posts: 2,126
Thanks: 3,209
Thanked 1,439 Times in 855 Posts
Mentioned: 19 Post(s)
Tagged: 2 Thread(s)
|
You need to scale the MAF when running an aftermarket intake such as the one from Perrin.
http://www.ft86club.com/forums/showt...01#post1842501 http://www.ft86club.com/forums/showthread.php?t=83945 IIRC it is normal for the throttle to be open a little bit.
__________________
|
|
|
|
| The Following User Says Thank You to D_Thissen For This Useful Post: | tracerit (06-26-2016) |
|
06-26-2016, 03:34 PM
|
#3 | |
|
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 30,407
Thanks: 29,790
Thanked 32,807 Times in 16,828 Posts
Mentioned: 715 Post(s)
Tagged: 2 Thread(s)
|
Quote:
 humfrz |
|
|
|
|
|
06-27-2016, 04:05 AM
|
#4 |
|
Senior Member
Join Date: Dec 2015
Drives: 2015 86 GTS + Mitsi Lancer GSR
Location: Lismore AUS
Posts: 215
Thanks: 127
Thanked 93 Times in 68 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Took the words right out of my fingers @humfrz
|
|
|
|
| The Following User Says Thank You to COO86L For This Useful Post: | humfrz (06-27-2016) |
|
06-27-2016, 12:33 PM
|
#5 |
|
Senior Member
Join Date: Apr 2014
Drives: 2013 SWP BRZ Limited
Location: Louisville, KY
Posts: 159
Thanks: 12
Thanked 47 Times in 34 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
yes, the throttle body stays slightly open. I had the same concern the first time I took mine off
|
|
|
|
|
06-27-2016, 07:12 PM
|
#6 |
Join Date: Jun 2012
Drives: Toyota 86 GT
Location: Sydney, Australia
Posts: 517
Thanks: 85
Thanked 263 Times in 147 Posts
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
|
The neutral position for the throttle body is slightly open. This position is close to where it sits at idle.
The ECU can fully close it. Also, it can go past fully open... |
|
|
|
|
|
|
|
|
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| SSP AT Valve Body Upgrade | nlowell | Engine, Exhaust, Transmission | 39 | 05-30-2017 05:32 PM |
| Variable Valve "Butterfly" Exhaust | dlux | Southern California | 19 | 02-22-2016 07:21 PM |
| Manual/Automatic Valve Body | Nevermore | Other Vehicles & General Automotive Discussions | 4 | 09-08-2015 01:15 AM |
