Finally my 1st (water cooled) turbo build - Page 16 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 10-18-2015, 03:38 PM   #301
Junior Member
iTrader: (1)
 
Join Date: Aug 2011
Posts: 86
Total Cats: 6
Default

Actually, That's probably not the problem if you were getting a reading of 19AFR (~5V) I guess it's good to be rigorous, but probably a waste of time.
Where were you measuring the voltage from? I REALLY hope the readings are wrong because if it's putting out a narrowband signal this all makes sense. If not, I don't really have much else to offer except some jokes about cows
squeegee is offline   Reply With Quote
Old 10-18-2015, 04:46 PM   #302
Elite Member
Thread Starter
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,661
Total Cats: 112
Default

I cant locate r10. I didn't build the unit, have no interest in building the unit, and don't have a diagram of how it should be. At this point, all I want to do is sign over my paycheck to someone that can fix this. 30 some hours of zero progress is really frustrating.
ryansmoneypit is offline   Reply With Quote
Old 10-18-2015, 04:49 PM   #303
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

Section 3.2.1 of the mtxl user guide. It's the analog output programming. It can be programmed to emulate a narrowband.
aidandj is offline   Reply With Quote
Old 10-18-2015, 04:51 PM   #304
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

Quote:
Factory Programmed Defaults:
Analog Output 1 is programmed to output between 0 V for an AFR of 7.35
(gasoline) and 5.0V for an AFR of 22.39. Analog Output 2 is 1.1 V for an AFR of 14 and .1 V for an AFR of 15. Other settings, of course, are easily
programmable between the minimum and maximum range specified earlier.
From the manual
aidandj is offline   Reply With Quote
Old 10-18-2015, 05:00 PM   #305
Junior Member
iTrader: (1)
 
Join Date: Aug 2011
Posts: 86
Total Cats: 6
Default

If I'm not mistaken, he's seeing the proper 0-5v signal at the MS, so it's not a gauge problem
squeegee is offline   Reply With Quote
Old 10-18-2015, 05:29 PM   #306
Elite Member
Thread Starter
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,661
Total Cats: 112
Default

yeah, I just checked with the o2 sensor at 22 afr per the mtx gauge, I do see 5v. at the pink wire on the ms. so, correct config on the analog output.
ryansmoneypit is offline   Reply With Quote
Old 10-18-2015, 05:54 PM   #307
Elite Member
Thread Starter
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,661
Total Cats: 112
Default

I think it is this MS unit. I found the build thread from the guy I bought it from, he never got the car to run right and eventually parted it out.

1. I have ID 1000's/ walbro 190hp and have to use a req. fuel of at least 6.0 just to get it to kind of run, and not even close to idle. 3.0 and it runs for 10-15 seconds then dies. Sitting at 3k rpm it will be running, then just stop, like I turned the ignition off. log shows nothing obvious. This is all on a base map. running the stock FPR.

2. Auto tune will not make any adjustments, regardless of settings. (could be related to discombobulated 02 readings)

3. My WB does not correlate with TS, even though I have a confirmed 0-5v output in the pink 02 signal wire. Once the correct signal goes into this black box, its out of my hands.

I was pretty comfortable with my ms2 and my car used to run great! So its not like I started trying to use TS yesterday., although it feels like that at the moment.
ryansmoneypit is offline   Reply With Quote
Old 10-18-2015, 05:57 PM   #308
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

It very well might be a dud megasquirt. Still have your ms2? II would contact diy, they can diagnose and tell you what is wrong. I've found emailing them gets the best response.
aidandj is offline   Reply With Quote
Old 10-18-2015, 06:09 PM   #309
Elite Member
Thread Starter
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,661
Total Cats: 112
Default

Quote:
Originally Posted by aidandj View Post
It very well might be a dud megasquirt. Still have your ms2? II would contact diy, they can diagnose and tell you what is wrong. I've found emailing them gets the best response.
sold the ms2 to fund the 3. I emailed them today, should hear back tomorrow.
ryansmoneypit is offline   Reply With Quote
Old 10-18-2015, 06:18 PM   #310
Junior Member
iTrader: (1)
 
Join Date: Aug 2011
Posts: 86
Total Cats: 6
Default

progress
squeegee is offline   Reply With Quote
Old 10-18-2015, 07:44 PM   #311
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 114
Default

Quote:
Originally Posted by ryansmoneypit View Post
I think it is this MS unit. I found the build thread from the guy I bought it from, he never got the car to run right and eventually parted it out.

1. I have ID 1000's/ walbro 190hp and have to use a req. fuel of at least 6.0 just to get it to kind of run, and not even close to idle. 3.0 and it runs for 10-15 seconds then dies. Sitting at 3k rpm it will be running, then just stop, like I turned the ignition off. log shows nothing obvious. This is all on a base map. running the stock FPR.

The basemap is not made for ID1000's or any modern fuel injector, I am not surprised. I use a seemingly random reqfuel, truth is it really doesn't matter what VE values are or what reqfuel you use. I bet if you try tuning it using the gauge alone, it would work fine. Turn the o2 correction authority to zero or just turn it off.

2. Auto tune will not make any adjustments, regardless of settings. (could be related to discombobulated 02 readings)

Yeah, autotune works off o2 readings only. I bet you see a o2 out of range yellow flag in the low right corner next time you try running it.


3. My WB does not correlate with TS, even though I have a confirmed 0-5v output in the pink 02 signal wire. Once the correct signal goes into this black box, its out of my hands.

Do you have a voltmeter? With the car on, does the voltage reading in tunerstudio jive with the battery/alternator/fuel injectors or is it terribly off?


I was pretty comfortable with my ms2 and my car used to run great! So its not like I started trying to use TS yesterday., although it feels like that at the moment.
stuff and things
deezums is offline   Reply With Quote
Old 10-18-2015, 07:54 PM   #312
Elite Member
Thread Starter
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,661
Total Cats: 112
Default

Quote:
Originally Posted by deezums View Post
stuff and things
I'll check the running voltage.

Good to know that require fuel is just a random number.

The rest of your suggestions I understand and have tried in any configuration you could imagine. I even started an entire new project tune, thinking that maybe my first one had become corrupt somewhere. Same results.
ryansmoneypit is offline   Reply With Quote
Old 10-20-2015, 03:23 PM   #313
Junior Member
 
Join Date: Jul 2014
Location: Kensington, MD
Posts: 229
Total Cats: -10
Default

Slight hijack: with WBO2 setups that have a simulated NB output, can the NB output wire just be connected to the harness end of where the single-wire OEM O2 sensor plugged in (e.g. in an OBD1 car), and will it then work just like the OEM sensor with the stock ECU?
huesmann is offline   Reply With Quote
Old 10-20-2015, 03:28 PM   #314
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

Yes
aidandj is offline   Reply With Quote
Old 10-20-2015, 03:29 PM   #315
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,968
Total Cats: 128
Default

Quote:
Originally Posted by ryansmoneypit View Post
...
Good to know that require fuel is just a random number....
I would disagree with that. Look into the code and how it's used, it's not just a random number, or at least in the past it wasn't. It used to be used in more than just the fuel table, other things as well were messed up if req fuel was wrong. I just use whatever req fuel it calculates, I don't see any benefit to changing it, my car runs perfect as is.
patsmx5 is offline   Reply With Quote
Old 10-20-2015, 03:35 PM   #316
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

REQ_FUEL is a scalar in the Pulsewidth calculation algorithm.

PW = REQ_FUEL * VE * MAP * E + accel + Injector_open_time

E = gamma_Enrich = (Warmup/100) * (O2_Closed Loop/100) * (AirCorr/100) * (BaroCorr/100)

So an "incorrect" req_fuel can be "fixed" by tuning VE.

Source: http://www.megamanual.com/v22manual/mfuel.htm
aidandj is offline   Reply With Quote
Old 10-20-2015, 03:37 PM   #317
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,968
Total Cats: 128
Default

Quote:
Originally Posted by aidandj View Post
REQ_FUEL is a scalar in the Pulsewidth calculation algorithm.

PW = REQ_FUEL * VE * MAP * E + accel + Injector_open_time

So an "incorrect" req_fuel can be "fixed" by tuning VE.

Source: How MegaSquirt(R) EFI Controllers Work
Question, cause I'm not digging through the current code. But in the past, it was also used in places other than just the PW calculation. If it's ONLY used in pulse width calcs then sure, modify it. But is it used anywhere else? Like warm up enrichment, or acceleration enrichment, or anything else?
patsmx5 is offline   Reply With Quote
Old 10-20-2015, 03:38 PM   #318
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

Read my edit. PW takes into account the Warmup and accel.
aidandj is offline   Reply With Quote
Old 10-20-2015, 03:39 PM   #319
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,853
Total Cats: 937
Default

I'm browsing the current code right now.
aidandj is offline   Reply With Quote
Old 10-20-2015, 03:41 PM   #320
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,968
Total Cats: 128
Default

Also what about injector dead time calcs, wouldn't those cause problems?
patsmx5 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Turbo 1995 Miata Low mileage Clean Tekel Cars for sale/trade 29 02-05-2016 05:16 PM
94-97 JR Header, FM Stage 1 Happy Meal, Carillo rods & Supertech Pistons eddy1128 Miata parts for sale/trade 8 12-10-2015 06:34 PM
Left over turbo build parts gdoehl Miata parts for sale/trade 16 10-01-2015 10:42 AM
E-Manage Base Maps faviles5566 ECUs and Tuning 0 09-04-2015 12:50 PM
E-Manage Base Maps faviles5566 ECUs and Tuning 0 09-04-2015 12:50 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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 10:42 AM.