MS3X Fueling Issues Log Inside - 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 04-15-2013, 09:51 AM   #1
Newb
Thread Starter
 
Join Date: Nov 2008
Location: Australia
Posts: 7
Total Cats: 0
Default MS3X Fueling Issues Log Inside

Recently built engine just finished piecing all the other things together and have hit a bit of a hurdle with the ecu.

Engine: 94 1.8 Built 9:1 Comp
Ignition: LS2 Coils
Injectors: ID1000CC
Sensors: GM IAT, LC-1 O2, Crank, Cam
ECU: MS3X, Full Sequential IGN/INJ

Issue seems to mainly be around fueling, Car seems to idle fine without map plugged in but when i plug it back in the car stalls and barely start unless i change the required fuel from 3.5 to 8.

The AFR's via the LC1 seem way off after several free air calibrations in both MS and LogWorks they skyrocket above 40. Double checked all the LC1 grounds everything seems fine so not sure what the means have attached screenshot of LogWorks.

Ignition is spot on have checked multiple times with timing light to ensure its correct. Attached a composite log csv.

Map i'm using is based off Braineack's have modified the following

Ingtion for LS2 Coils, Injection Dead Times as per LINK, Scaled Tables to 250kpa, Calibrated TPS,O2,MAP,CLT,IAT

I've even swapped the MS board out of my other car which was working perfectly so i dont think its an ecu problem both ran the same.

Any assistance would be much appreciated
Attached Thumbnails
MS3X Fueling Issues Log Inside-jp.jpg  
Attached Files
File Type: msl 2013-04-15_21.37.45.msl (304.9 KB, 50 views)
File Type: csv 2013-04-15_21.35.39.csv (157.5 KB, 35 views)
File Type: msl 2013-04-15_21.33.59.msl (566.4 KB, 46 views)
File Type: msl 2013-04-15_21.29.20.msl (752.1 KB, 33 views)
File Type: msq CurrentTune.msq (189.1 KB, 36 views)
Angryoven is offline   Reply With Quote
Old 04-15-2013, 09:55 AM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

with those injectors you pretty much need to double that fuel map. Your lowest VE% values should be in the 60s, not 20s. this explains the need to double the req. fuel value to idle.

when you unplug it, the MS sees 100kPa, at 100kPa your VE% values are in the 60s...


your lag factors should all be set between maybe 80-100, you have major software filtering applies to all your inputs, this will cause hesitation and delays.

Last edited by Braineack; 04-15-2013 at 11:20 AM.
Braineack is offline   Reply With Quote
Old 04-15-2013, 10:10 AM   #3
Newb
Thread Starter
 
Join Date: Nov 2008
Location: Australia
Posts: 7
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
with those injectors you pretty much need to double that fuel map. you lowest VE% values should be in the 60s, not 20s. this explains the need to double the req. fuel value to idle.

when you unplug it, the MS sees 100kPa, at 100kPa your VE% values are in the 60s...


your lag factors should all be set between maybe 80-100, you have major software filtering applies to all your inputs, this will cause hesitation and delays.
Thanks, that makes a lot of sense I'll make those changes and give it another crack tomorrow night.

Any ideas about the O2 sensor and the abnormal readings?
Angryoven is offline   Reply With Quote
Old 04-15-2013, 11:19 AM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

no idea, never seen it do that before, typically pegs to 23.4% or something when no reading.
Braineack is offline   Reply With Quote
Old 04-15-2013, 12:55 PM   #5
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

The LC1 is displaying % oxygen because air/fuel is too lean.

You can leave the req fuel at 8 and tune your fuel table as is, or you can fix your req fuel and add double all the numbers in your VE table.
Ben is offline   Reply With Quote
Old 04-15-2013, 10:35 PM   #6
Junior Member
iTrader: (20)
 
Join Date: Apr 2010
Location: Redmond, WA
Posts: 494
Total Cats: 15
Default

I've got 94 with a built 1.8L 8.6:1 compression, LS2 coils sequential, ID1000's sequential with a ms3x. I'll post my tune up if you want to take a look. My REQ_Fuel is 3.1 as the calculator has put it. My deadtime is 1.1ms at 13.2v with the edited curve from the ID website. VE_Table idle is in the mid to high 60's. Hope this helps! It's on 1.2.0a ms3 firmware

Obviously don't just load it and try to start your car without doing your own settings
Attached Files
File Type: msq bmxfuel007-2013-04-15_18.27.54.msq (176.9 KB, 56 views)
bmxfuel007 is offline   Reply With Quote
Old 04-21-2013, 12:04 AM   #7
Newb
Thread Starter
 
Join Date: Nov 2008
Location: Australia
Posts: 7
Total Cats: 0
Default

All good guys thanks for the help!

Doubled the fuel mixture, moved the O2 sensor and changed the bung to a shorter bung as I had the extended bung.
Angryoven is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM


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 05:59 PM.