Adaptronic
Sponsored by:
Sponsored by:

Crappy post-crank idle

 
Old 08-13-2009, 10:27 AM
  #1  
Elite Member
Thread Starter
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,847
Total Cats: 28
Default Crappy post-crank idle

My post-crank idle is crap right now. I have been trying different post-crank enrichment settings and am not there yet. Getting tired of screwing with it. What are you guys using?

Once the enrichment goes away it idles and runs just fine. Seems like I tried it with no enrichment at all and it was still not right.
ZX-Tex is offline  
Old 08-13-2009, 10:35 AM
  #2  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,141
Total Cats: 3,145
Default

I'm using y8's enrichment settings and added +2 to each from 30*-45* and -1 to each from 100*-105* and its decent. Not perfect still but getting there and definitely not bad. Idle afr is anywhere between 15-13.6 almost always.
18psi is offline  
Old 08-13-2009, 11:07 AM
  #3  
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,179
Total Cats: 509
Default

I use about 20 for 1250 for short
and 30 for 25000 for long

is your "coolant enrichment low MAP" set properly?


generally speaking,
if it starts good and slows down and dies, it's too lean.
if it starts slow and sputtery and cleans up and idles normally, it's too rich.

add/subtract in 5% increments to get a feel for those two points. of course it's kinda hard when it's warm but... you get the idea.
Attached Thumbnails Crappy post-crank idle-clt_low.gif  
y8s is offline  
Old 08-13-2009, 11:13 AM
  #4  
Elite Member
Thread Starter
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,847
Total Cats: 28
Default

Originally Posted by y8s View Post
I use about 20 for 1250 for short
and 30 for 25000 for long

is your "coolant enrichment low MAP" set properly?


generally speaking,
if it starts good and slows down and dies, it's too lean.
if it starts slow and sputtery and cleans up and idles normally, it's too rich.

add/subtract in 5% increments to get a feel for those two points. of course it's kinda hard when it's warm but... you get the idea.
Right now it starts slow and sputtery then cleans up and idles normally. So I think it is too rich. I'll mess with it some more. I'll also check the "coolant enrichment low MAP". I think I set it up but need to double-check it.

Which injectors are you running again?

Thanks
ZX-Tex is offline  
Old 08-13-2009, 11:57 AM
  #5  
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,179
Total Cats: 509
Default

550cc.

I'd drop the long post crank. sounds like that's where it's causing problems.

remember it's mostly used to provide enough fuel for combustion when the motor is too cold to maintain reasonable atmoization and intake wetting. thats why you can sometimes see lean conditions even when you're dumping in fuel at startup.
y8s is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
The Gleas
MEGAsquirt
3
10-01-2015 09:30 AM
JesseTheNoob
DIY Turbo Discussion
15
09-30-2015 02:44 PM
itsMikey
MSPNP
3
09-28-2015 06:40 AM
ndragun
MEGAsquirt
0
09-20-2015 10:28 PM


Thread Tools
Search this Thread
Quick Reply: Crappy post-crank idle


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.