bouncy WBO2 signal - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 11-25-2007, 01:28 AM   #1
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default bouncy WBO2 signal

alrighty... thanks to all you guys that provided maps (particularly CJerigan and DIY AutoTune) my car is drivable with the turbo now.

The down side is that I have no idea how to tune it with the AFR as jumpy as it is. Check out the attached photo... is this normal?

Last edited by Arkmage; 11-27-2007 at 05:17 PM.
Arkmage is offline   Reply With Quote
Old 11-25-2007, 01:31 AM   #2
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Does the JAW gauge itself go crazy like that as well or is it more smooth in it's readout? Also, is it grounded to the same spot as the MS?
That's not normal, it should not spike real high then drop in half a second like that.
This is normal.

Last edited by cjernigan; 11-25-2007 at 01:47 AM.
cjernigan is offline   Reply With Quote
Old 11-25-2007, 01:46 AM   #3
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

Quote:
Originally Posted by cjernigan View Post
Does the JAW gauge itself go crazy like that as well or is it more smooth in it's readout? Also, is it grounded to the same spot as the MS?
That's not normal, it should not spike real high then drop in half a second like that.
This is normal.

hey that looks awfulll familiar I think you got your logs crossed chad
magnamx-5 is offline   Reply With Quote
Old 11-25-2007, 01:47 AM   #4
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Indeed, pretty sure that is your icecream run. Kinda funny, i opened it because it was the only one on my desktop, then had to question myself where it came from.
cjernigan is offline   Reply With Quote
Old 11-25-2007, 02:00 AM   #5
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

Yeah that was the day i was hankering for a sundea.
magnamx-5 is offline   Reply With Quote
Old 11-25-2007, 02:07 AM   #6
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

Quote:
Originally Posted by cjernigan View Post
Does the JAW gauge itself go crazy like that as well or is it more smooth in it's readout? Also, is it grounded to the same spot as the MS?
That's not normal, it should not spike real high then drop in half a second like that.
This is normal.
It's grounded to the chassis in the same location as the MS (Stock ECU mounting bolt). The display moves around quite a bit also, but it's hard to say if it's moving around as fast since I'm driving and not staring at the display.

Any ideas on what I can do to fix this? I don't believe I am running that lean because generally 22 afr won't burn.
Arkmage is offline   Reply With Quote
Old 11-25-2007, 02:13 AM   #7
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

You can check to see how fast it moves by just revving it sitting still. If you hold the laptop near the JAW gauge you can kind of tell if they're reading the same. Is the jaw adjustable in any way? To restrict it's jumpiness. I know it's a DIY setup but i don't know if you can adjust some firmware for it to make it read slower.
cjernigan is offline   Reply With Quote
Old 11-25-2007, 02:16 AM   #8
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

Quote:
Originally Posted by cjernigan View Post
You can check to see how fast it moves by just revving it sitting still. If you hold the laptop near the JAW gauge you can kind of tell if they're reading the same. Is the jaw adjustable in any way? To restrict it's jumpiness. I know it's a DIY setup but i don't know if you can adjust some firmware for it to make it read slower.
The slowest setting is 8 Hz, that's where it's set at. :(
Arkmage is offline   Reply With Quote
Old 11-25-2007, 02:31 PM   #9
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

1) verified that the JAW display doesn't jump around like the MS readout.

2) output from JAW to MS is stable (read w/ multimeter)

any ideas? there are only 4 connection points in the line.

1) screw terminal at JAW
2) insulated spade connector under center console
3) wire to DB37
4) DB37 to MS

Right now I'm thinking I may have a bad solder joint on the db37, but it's going to suck to take that apart and check so if there are other ideas I'm open to trying them out.
Arkmage is offline   Reply With Quote
Old 11-25-2007, 06:13 PM   #10
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

removed connection 2 and soldered the joint, I also checked the connection on the db37 and it's clean and solid. I have less than .3 ohms between the controller output and the MS input. Still have a **** ton of noise. Come on fellas, I need help here.

Image is at idle so you can see how nasty this is just sitting still.

*edit* anyone know which pin on the LSU wbo2 is the heater ground? I think I'm going to disconnect it from the JAW and ground it somewhere else and see if that solves the issue.
Arkmage is offline   Reply With Quote
Old 11-25-2007, 06:17 PM   #11
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

Hmm how is your config for the wideband set? For 0-5V LC1 or something?
magnamx-5 is offline   Reply With Quote
Old 11-25-2007, 11:20 PM   #12
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

Quote:
Originally Posted by magnamx-5 View Post
Hmm how is your config for the wideband set? For 0-5V LC1 or something?
Correct 0-5V LC1 output from the JAW. MS is configured for the same.

I isolated the heater ground and grounded it near the shift turret. That seems to have helped but the signal is still nasty as hell.

ideas?
Arkmage is offline   Reply With Quote
Old 11-25-2007, 11:30 PM   #13
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Man i really can't come up with anything. Have you email 14point7 or called him up possibly? Grounds and configuration are usually the only issue with widebands that i know of.
cjernigan is offline   Reply With Quote
Old 11-26-2007, 01:02 AM   #14
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

Quote:
Originally Posted by cjernigan View Post
Man i really can't come up with anything. Have you email 14point7 or called him up possibly? Grounds and configuration are usually the only issue with widebands that i know of.
sent him an e-mail... no response yet, but I'm not surprised since it's a holiday weekend and all.
Arkmage is offline   Reply With Quote
Old 11-26-2007, 02:31 AM   #15
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

On you screencap...I see a Max AFR of 21.991. How could that be if you have BOTH your LC-1 and Megatune/Megasquirt for 0-5V -> 10-20AFR?

Jim
Reverant is offline   Reply With Quote
Old 11-26-2007, 06:25 AM   #16
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

fuel cut overrun. and maybe abit of over voltage.
magnamx-5 is offline   Reply With Quote
Old 11-26-2007, 11:33 AM   #17
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

Quote:
Originally Posted by Reverant View Post
On you screencap...I see a Max AFR of 21.991. How could that be if you have BOTH your LC-1 and Megatune/Megasquirt for 0-5V -> 10-20AFR?

Jim
Arkmage is offline   Reply With Quote
Old 11-26-2007, 03:53 PM   #18
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Hint: You have 0-5V -> 7-22 AFR somewhere.

Jim
Reverant is offline   Reply With Quote
Old 11-26-2007, 05:27 PM   #19
Elite Member
Thread Starter
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

I don't want hints.. I want solutions... I'm tool slow to figure out hints.
Arkmage is offline   Reply With Quote
Old 11-26-2007, 05:36 PM   #20
jwx
Junior Member
 
Join Date: Sep 2007
Location: North of Atlanta
Posts: 78
Total Cats: 0
Default

Quote:
Originally Posted by Arkmage View Post
I don't want hints.. I want solutions... I'm tool slow to figure out hints.
I think what he was hinting at was to change the setting to 0v=10.1 and 5v=20.1...
jwx is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Run boost gauge from ECU MAP? Itty MSPNP 6 09-22-2015 12:02 PM
mslabs MS2 - Idle control issue ndragun MEGAsquirt 0 09-20-2015 11:28 PM
ms2e No Rpm Signal Dobzeh ECUs and Tuning 5 09-17-2015 03:56 PM
In need of AEM guidance W/pics E=MC^2 AEM 1 09-17-2015 01:34 PM


Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:33 AM.