Notices
MEGAsquirt A place to collectively sort out this megasquirt gizmo

Cold start problem - V3 MS1

Thread Tools
 
Search this Thread
 
Old Nov 11, 2009 | 01:11 PM
  #1  
fr3n2y's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 57
Total Cats: 0
From: Bournemouth, Dorset UK
Default Cold start problem - V3 MS1

Hi all,

i've been running V3 MS1 on my 92 Eunos for a couple of weeks now and cold starts, morning or after work when the car has been sat most of the day are, frankly crap.

It takes a good 10 secs with the key and pumping the peddle to get her started then i have to hold the revs around 2500rpm for around 30 secs otherwise she'll stall. Once warm the car is fine.

When starting her up for the first time i get lots of pops, shakes and bangs and a really strong smell of fuel. Also for a couple of minutes after shes been running the revs fluctuate between 1500 and 2100rpm Could she be flooding?

I'm on a stock 1.6 engine with 1.8 (beige top) injectors and the MSPNP base map. The only setting i have changed is the required fuel for the bigger injectors.

What do i need to adjust to try and get cold starts better?? I'm a total noob with this stuff and still learning so appreciate any help.

Oh and I'm using Tunerstudio.

Thanks in advance.
Old Nov 11, 2009 | 01:13 PM
  #2  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

open up the cranking/prime table.

at your particular temp in the morning, lower the fuel value signigantly, then work your way up about .2ms until it starts right up.
Old Nov 11, 2009 | 01:29 PM
  #3  
fr3n2y's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 57
Total Cats: 0
From: Bournemouth, Dorset UK
Default

Hey thanks, so this screen -

Name:  tstest-1.jpg
Views: 190
Size:  84.6 KB

reduce all the numbers?
Old Nov 11, 2009 | 01:35 PM
  #4  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

lets say it.s 4*C out right now. Focus on that particular number for now.

Just glancing it already looks like your injecting too much fuel at that temperature comparing the 16*C and -7*C numbers.
Old Nov 11, 2009 | 01:39 PM
  #5  
fr3n2y's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 57
Total Cats: 0
From: Bournemouth, Dorset UK
Default

brilliant so i'll half the numbers from 4C upwards and give it a shot, thanks for your swift reply.
Old Nov 11, 2009 | 03:27 PM
  #6  
fr3n2y's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2009
Posts: 57
Total Cats: 0
From: Bournemouth, Dorset UK
Default

Well looks like you were right, I halved all the figures from 4c upwards, turned the key and she fired up first time!!!! didn't touch the pedal at all!! I had to up the figures slightly from about 38 upwards to get her to restart but now she's fine.

Name:  theyfuckinwork.jpg
Views: 187
Size:  82.4 KB

well chuffed.

Excellent work Brianeack, many thanks

Mel
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Joe Perez
MEGAsquirt
188
Mar 24, 2025 06:56 PM
Cross
MEGAsquirt
70
Jun 29, 2011 02:29 PM
hellaUNflush
Engine Performance
4
Dec 5, 2010 08:10 PM
CRAIGO
MEGAsquirt
5
Dec 16, 2009 12:51 PM
crazymparts
MEGAsquirt
5
Aug 13, 2008 02:55 PM




All times are GMT -4. The time now is 02:19 AM.