Rich rough 500rpm idle - 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 07-26-2010, 08:39 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2009
Location: Tennessee
Posts: 58
Total Cats: 0
Default Rich rough 500rpm idle

Well i got my car running again today woot! small feat though cause the car only idles at 500 apm and runs extremely rich aka black smoke from exhaust.

Also it breaks up alot at any steady rpm. And im not getting a accurate o2 reading from my LC1 controller, it just reads 7.5 and bounces to 22.5 every now and then.

I tried setting the Ignition offset angle and it dosnt seem to matter what deg. i enter it runs the same.

99 1.8l MS2

Update:
When i turn the required fuel down to 3 ms it idles fine at a good 900 rpms and no more black smoke but it dies as soon as i give it any throttle.

Last edited by hbrew; 07-27-2010 at 02:05 AM. Reason: Updated
hbrew is offline   Reply With Quote
Old 07-27-2010, 12:43 AM   #2
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

Your first step is to STOP ******* WITH SETTINGS YOU OBVIOUSLY DON'T UNDERSTAND. That's how stuff gets broken.

reqfuel isn't some number you randomly dick with to get your fueling right. It is a somewhat narrowly defined value based on number of cylinders, displacement, and injector flow rate. I'd recommend that you use the built-in calculator to get the value and then don't change it.

Similarly, ignition offset isn't some number you randomly change in an effort to make it run right. It is a specific value that you determine using a timing light. It cannot be determined any other way, and once you set it you don't change it.

You need to read the "super important megasquirt threads" that are stickied at the top of this forum. That info should help get you running, and your WBO2 configured correctly. Also go to www.megamanual.com, specifically the "tuning" section, and start reading about what all the settings in the software are for. There is also a quick tuning guide here.
ScottFW is offline   Reply With Quote
Old 07-27-2010, 01:49 PM   #3
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2009
Location: Tennessee
Posts: 58
Total Cats: 0
Default

Is it normal for the car to die when you enter a degree and hit burn?
hbrew is offline   Reply With Quote
Old 07-27-2010, 01:51 PM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

no
Braineack is offline   Reply With Quote
Old 07-27-2010, 01:58 PM   #5
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2009
Location: Tennessee
Posts: 58
Total Cats: 0
Default

Could it be from too much degree change? i started off at 65 as recommended and went down to 60 and up to 70 and still dies.
hbrew is offline   Reply With Quote
Old 07-27-2010, 02:43 PM   #6
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Quote:
Originally Posted by hbrew View Post
Is it normal for the car to die when you enter a degree and hit burn?
It often hiccups a little, so if it's already running rough, this will happen.
Matt Cramer is offline   Reply With Quote
Old 07-27-2010, 09:00 PM   #7
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2009
Location: Tennessee
Posts: 58
Total Cats: 0
Default

I didnt realize the tunerstudio did the degree adjustments on the fly so there was no need to hit burn. But i didnt get it timed correctly.

I think its ready to tune now, to get rid of the rich idel i adjust the fuel in the fuel ve table correct?
hbrew is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Momo Supercup seat jpreston Miata parts for sale/trade 2 05-17-2016 01:51 AM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM


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 05:17 AM.