follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Forced Induction

Forced Induction Turbo, Supercharger, Methanol, Nitrous


User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-24-2020, 04:10 PM   #29
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
it goes from startup and initial idle at 15k, drops to standard idle which is a bit erratic, then to 2k, two accelerator spikes, then up to 3k
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 04:33 PM   #30
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Irace86.2.0 View Post
https://datazap.me/u/jirace/v7-85mm-...og=0&data=8-29

Something like this is easier to see, but I don't see anything in boost from your upload. Was this log with you just idling the car and revving it?

Is that an erratic idle?
https://datazap.me/u/snowtaipan/ecut...log=0&data=3-7
Tell me if I'm wrong, the MAP should be the SC PSI right? cause thats low AF
4PSI at 3k RPM??
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 04:59 PM   #31
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by snowtaipan View Post
https://datazap.me/u/snowtaipan/ecut...log=0&data=3-7
Tell me if I'm wrong, the MAP should be the SC PSI right? cause thats low AF
4PSI at 3k RPM??
That looks like you were idling then revved it a little based on the throttle angle/accelerator %.

You never saw any boost. Boost is anything above atmospheric, so higher than 1 bar. You were in vacuum only.

Compare it to mine.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
Old 04-24-2020, 05:14 PM   #32
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
I'm going to smoke it from my bypass valve to the back of the SC, that's gotta tell me something
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 06:48 PM   #33
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by snowtaipan View Post
I'm going to smoke it from my bypass valve to the back of the SC, that's gotta tell me something
Any chance your bypass valve is sticking?
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
Old 04-24-2020, 08:02 PM   #34
tomm.brz
Senior Member
 
Join Date: Jan 2017
Drives: brz 2017 hksv2
Location: italy
Posts: 2,183
Thanks: 499
Thanked 1,059 Times in 769 Posts
Mentioned: 64 Post(s)
Tagged: 0 Thread(s)
the log is almost to see but not enough to judge.. , it s not erratic idle, you can see him blipping

It s strange, to me sounds like vacuum leak but i would need to see a longer log, with actually driving

just a few second cold start where most of the time the Ecu forces 50/50% DI/PI isn t ideal

Also strange the values sensed by the MAP, not sure why though

Need more info... has this tune/car ever driven ok before? is the problem come out just lately? who tuned it and have you asked him?
tomm.brz is offline   Reply With Quote
The Following User Says Thank You to tomm.brz For This Useful Post:
Irace86.2.0 (04-24-2020)
Old 04-24-2020, 08:54 PM   #35
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Irace86.2.0 View Post
Any chance your bypass valve is sticking?
So I was just digging into the BPV. I noticed when my wife started the car and did a pull on it that the BPV was open, at least partially, the whole time. So in theory I would be low on boost. I'm just not sure a) is it actually malfunctioning and if it is malfunctioning weather b) the spring is week and it opens to easy or c) something other than the BPV is bad and pulling a tone of vacuum
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 08:59 PM   #36
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by tomm.brz View Post
the log is almost to see but not enough to judge.. , it s not erratic idle, you can see him blipping

It s strange, to me sounds like vacuum leak but i would need to see a longer log, with actually driving
I'm uncomfortable doing and actual drive, and my POS laptop can't be counted on without a wall plug

just a few second cold start where most of the time the Ecu forces 50/50% DI/PI isn t ideal

Also strange the values sensed by the MAP, not sure why though
I'm starting to suspect the BPV wasn't calibrated correctly. OR somethings pulling way too much vacuum on it, cause it opens at startup and basically stays wide open

Need more info... has this tune/car ever driven ok before? is the problem come out just lately? who tuned it and have you asked him?
No, this issue was present immediately after install. The tune came direct from Edelbrock, it's a CARB legal plug and play set for a bone stock car, which mine was
.
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 09:12 PM   #37
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
So I smoked the BPV to the SC, smokes out the TB
Smoked the right side PCV, smokes out the TB
Sooooo i capped the TB and ran probably 10lbs of smoke from the left side PCV. didn't go anywhere. No leaks. WTF. That should pressurize the entire system. I could see the plastic over the TB bulging.

I'm pretty sure it's not a vacuum leak, unless I should't be getting it coming back to the TB.

https://datazap.me/u/snowtaipan/2017...=0&data=3-7-23

So my thought is, the BPV is opening to easy, so a tiny bit of vacuum and she vents boost. The TMAP sensor sees not enough pressure.. yeah my brain's dead.
snowtaipan is offline   Reply With Quote
Old 04-24-2020, 09:13 PM   #38
BirdTRD
Simply Forgotus
 
BirdTRD's Avatar
 
Join Date: Sep 2013
Drives: 2014 Supercharged SSM BRZ Limited
Location: Baltimore, MD
Posts: 916
Thanks: 735
Thanked 912 Times in 454 Posts
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Garage
Do you have a vaccum pump, like a MityVac? Testing the bypass valve with one is best way to determine if it is functioning properly. I have the old style bypass valve and here are some notes I took when I was having a problem with a leak.

Bypass valve ops
vacuum = open, bypassing SC compressed air
no Vacuum (car off, resting condition) or during boost = closed, using SC compressed air
tested with vacuum pump and it begins to open (pull in) at ~5in/Hg (-2.5 psi) and is fully open at ~10 in/Hg (-5 psi) and should hold


Edit 2
***Just checked with it on the car and it was ~6in/Hg started to pull in and ~12in/Hg fully opened***

Last edited by BirdTRD; 04-24-2020 at 09:49 PM. Reason: added a note
BirdTRD is offline   Reply With Quote
The Following User Says Thank You to BirdTRD For This Useful Post:
Irace86.2.0 (04-24-2020)
Old 04-24-2020, 11:09 PM   #39
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Like it’s been said, off throttle equals vacuum equals open valve. On throttle equals boost equals closed valve.

__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
The Following User Says Thank You to Irace86.2.0 For This Useful Post:
snowtaipan (04-25-2020)
Old 04-25-2020, 01:03 AM   #40
Irace86.2.0
Senior Member
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,882
Thanks: 5,665
Thanked 5,802 Times in 3,297 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by snowtaipan View Post
So I smoked the BPV to the SC, smokes out the TB
Smoked the right side PCV, smokes out the TB
Sooooo i capped the TB and ran probably 10lbs of smoke from the left side PCV. didn't go anywhere. No leaks. WTF. That should pressurize the entire system. I could see the plastic over the TB bulging.

I'm pretty sure it's not a vacuum leak, unless I should't be getting it coming back to the TB.

https://datazap.me/u/snowtaipan/2017...=0&data=3-7-23

So my thought is, the BPV is opening to easy, so a tiny bit of vacuum and she vents boost. The TMAP sensor sees not enough pressure.. yeah my brain's dead.
I wouldn’t want to jump to any conclusions. It is fairly short duration. Any problems on your end?

Warm up the engine. Try logging a 3-5 minute idle. Then do a separate 2k hold for 2 minutes then do a 3k hold for two minutes. Post those three datalogs. Post comments about your impressions on each.
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
Irace86.2.0 is offline   Reply With Quote
The Following 2 Users Say Thank You to Irace86.2.0 For This Useful Post:
snowtaipan (04-25-2020), tomm.brz (04-25-2020)
Old 04-25-2020, 12:56 PM   #41
BirdTRD
Simply Forgotus
 
BirdTRD's Avatar
 
Join Date: Sep 2013
Drives: 2014 Supercharged SSM BRZ Limited
Location: Baltimore, MD
Posts: 916
Thanks: 735
Thanked 912 Times in 454 Posts
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Garage
"I'm starting to suspect the BPV wasn't calibrated correctly. OR somethings pulling way too much vacuum on it, cause it opens at startup and basically stays wide open"

This is normal behavior. Vacuum at idle is (or should be) more than enough to pull the valve fully open and hold it there, allowing uncompressed air to bypass the SC rotors.

When my valves diaphragm had a tear in it, there was still enough vacuum to open it and hold it open at idle so the valve appeared to behave normally. However, due to that tear, I now had a vacuum leak which gave me the same symptoms you're seeing right now.
BirdTRD is offline   Reply With Quote
The Following User Says Thank You to BirdTRD For This Useful Post:
snowtaipan (04-25-2020)
Old 04-25-2020, 04:37 PM   #42
snowtaipan
Senior Member
 
snowtaipan's Avatar
 
Join Date: Jun 2017
Drives: '17 BRZ Series Yellow Edelbrock SC
Location: Clarksville, KY
Posts: 100
Thanks: 18
Thanked 23 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Unhappy

So I rechecked hoses, wires, clamps etc.
Re flashed the ECU for I think the 5th time
Started logging before I cranked it
Idled until LTFT stabilized (Again around 35-40)
Held at 2k RPM for 1 minute
Held at 3k RPM for 1 minute
held at idle.

I'm uncomfortable doing any more logging with the trim that high, so if we can work with what we got great, if not I don't know what to do but I'm worried I'm going to break something beyond whatever the current issue is.

I do see that as the fuel learn creeps up with the LTFT, there's no real issue with the AFR. It's slightly high, but not at like 19 or something. Also shouldn't MAF voltage spike when I open throttle, and shouldn't MAF g/s be higher?


https://datazap.me/u/snowtaipan/fina...zoom=1338-1484

Last edited by snowtaipan; 04-25-2020 at 05:08 PM.
snowtaipan is offline   Reply With Quote
The Following User Says Thank You to snowtaipan For This Useful Post:
Irace86.2.0 (04-25-2020)
 
Reply

Tags
edelbrock, p0171, p117b, supercharger

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
P015A, P015B, P0171, P117B and P0170. kev0 Issues | Warranty | Recalls / TSB 5 08-21-2019 01:30 PM
too lean issue? p117B p0171 engine codes zackegle Issues | Warranty | Recalls / TSB 1 03-21-2017 08:03 PM
P1170 P117B Direct Injection Issue? gonzo Issues | Warranty | Recalls / TSB 4 01-11-2017 02:23 PM
Oft Tune E85 Showing Codes P1170 P117B gonzo Software Tuning 30 09-05-2015 02:50 PM
Engine Code: P0172 P117B *KID* Engine, Exhaust, Transmission 2 01-25-2013 04:23 PM


All times are GMT -4. The time now is 07:53 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.