Microtech Area is for discussing Microtech systems

Need Help With 1680cc Primary Startup

Old 01-11-17, 04:12 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Oct 2013
Location: Tulsa, OK
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
Need Help With 1680cc Primary Startup

Running into a brick wall here. I'm having issues getting my Cosmo RE to start in sub 0*C temps.

Disclaimer: Yes, I'm aware the primaries are too large for a low res ECU to be accurate.

The car is a Cosmo RE swapped FC, after the car starts the first time, it has ZERO problems restarting, However, if water temp is below 0*C it won't even act like it wants to start, starter will just crank over without even trying to catch.

Microtech LT8X configured for direct fire using FD trailing coils, the car was originally tuned on e85, I'm converting it over to 91.

I've played with the cranking fuel map and have got nada, was wondering if anyone has a base map suggestion or experience with a similar setup? Basically just need the car to fire up once to drive an hour and park it for the rest of the winter.
Kenny McKee is offline  
Old 01-12-17, 02:33 AM
  #2  
Full Member
 
Join Date: Mar 2013
Location: Western Australia
Posts: 145
Likes: 0
Received 0 Likes on 0 Posts
If its just to start it once spray some starter fluid through the throttle body.
rx3sum is offline  
Old 01-14-17, 02:23 PM
  #3  
Rotary Enthusiast
 
Join Date: Aug 2008
Location: Portsmouth UK
Posts: 1,101
Received 13 Likes on 13 Posts
You say you have played with cranking. Have you looked at water map and maybe air map? I am a bit newbie to this myself but have been tuning my idle recently and running into similar things. I have a number of threads about rich idle made recently which might give you some ideas. I found air temp started being a factor but then my air map has been messed with a little from the base map. So assuming yours hasn't I would guess water map maybe? Add in a load of fuel at 0 degrees and see what happens. You can always take it out again. Maybe don't go too mad with the 1680's! Which incidentally is what I was running before and got convinced to change them. i go t some 875 deka injectors in the end. They are better but I would say the improvement versus the ECU limitations is probably a bit swings and round abouts in my experience. There is maybe an extra click either way on the map adjust to play with fine tune wise but I cannot actually get a consistent leaner idle due to other ecu limitations I am trying to work around.
Good luck!
Leeroy_25 is offline  
Old 01-15-17, 10:08 AM
  #4  
Rotary Enthusiast
iTrader: (1)
 
13btnos's Avatar
 
Join Date: Oct 2004
Location: VISTA
Posts: 790
Likes: 0
Received 3 Likes on 3 Posts
Are you trying to start on e85 or 91 octane? If 91 then take out 25-30% out the idle map or add fuel in the H2O map in the zero degree area.
13btnos is offline  
Old 01-18-17, 01:07 PM
  #5  
Junior Member
Thread Starter
 
Join Date: Oct 2013
Location: Tulsa, OK
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
I just waited until the temperature came back up. I have all the fuel pulled back for 91, car still refused to even kick if water temp was reading under -3*C
Kenny McKee is offline  
Old 01-21-17, 10:16 AM
  #6  
Engine, Not Motor
iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,671
Likes: 0
Received 23 Likes on 22 Posts
Sounds like you need to adjust the Water table and cranking temperature table with a bit more fuel.
Aaron Cake is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: