MEGAsquirt A place to collectively sort out this megasquirt gizmo

Fuel scaling is wrong and cold start is bad.

Old 01-10-2010, 06:47 PM
  #1  
Junior Member
Thread Starter
 
Cookie Monster's Avatar
 
Join Date: Oct 2009
Location: Mesa, AZ
Posts: 169
Total Cats: 0
Default Fuel scaling is wrong and cold start is bad.

Maybe someone here knows how to fix my fuel scaling. I am using the megatune and base map from DIYautotune. My VE fuel scaling goes from 20kpa up to 263 kpa. My tuners laptop only goes up to about 140 using the same program. My car is boosting only 7 psi and goes all the way to the top row and I know that's wrong. So why does my laptop and his laptop have different scaling if we're using the same software from the same site?

Also after tuning my car has been realy hard to cold start. It starts then dies, starts then dies, untill it's warm enough or has enough fuel to stay running. My wide band shows that I need more fuel during cold start how can I change this?
Cookie Monster is offline  
Old 01-10-2010, 06:59 PM
  #2  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,483
Total Cats: 4,076
Default

it's all relative to the tune you have loaded. you can rescale your table however you want.

for example, in MS-I, I use 3 boosted rows: 128, 184, 212. They rest 26-100 I scaled to give myself better cruising resolution.

Braineack is offline  
Old 01-10-2010, 07:05 PM
  #3  
Junior Member
Thread Starter
 
Cookie Monster's Avatar
 
Join Date: Oct 2009
Location: Mesa, AZ
Posts: 169
Total Cats: 0
Default

Well it's weird because at full boost it will be like 140 kpa on his computer (top row) and 263 kpa top row on mine also. It's like it just ignores it.
Cookie Monster is offline  
Old 01-11-2010, 11:32 AM
  #4  
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,332
Total Cats: 67
Default

What sort of MAP sensor are you running? Make sure it's set for that in the Configurator or the MAP will read incorrectly.
__________________
Matt Cramer
www.diyautotune.com
Matt Cramer is offline  
Old 01-11-2010, 11:49 AM
  #5  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,483
Total Cats: 4,076
Default

ah, that's makes much more sense. sounds like your laptop is set for 4-bar the other for the 2.5 bar, considering your map shouldn't even go above 250kPa.
Braineack is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Full_Tilt_Boogie
Build Threads
84
04-12-2021 04:21 PM
tazswing
Race Prep
20
10-03-2015 11:04 AM
The Gleas
MEGAsquirt
3
10-01-2015 09:30 AM
lsc224
Miata parts for sale/trade
2
10-01-2015 09:17 AM
mx592
Suspension, Brakes, Drivetrain
1
10-01-2015 12:45 AM


Thread Tools
Search this Thread
Quick Reply: Fuel scaling is wrong and cold start is bad.



All times are GMT -4. The time now is 05:20 AM.