leans out after hot for awhile - Page 2 - 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 03-03-2010, 03:28 PM   #21
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

so can i buy just the sensor
jhad is offline   Reply With Quote
Old 03-03-2010, 04:01 PM   #22
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

so if i can get a better fuelmap and turn off corrections, in theory it should stop doing it
jhad is offline   Reply With Quote
Old 03-03-2010, 04:14 PM   #23
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

yes. that's the theory and how i'd test it out before listening to some braineack.
Braineack is online now   Reply With Quote
Old 03-04-2010, 09:08 AM   #24
Junior Member
iTrader: (1)
 
Join Date: Feb 2006
Posts: 196
Total Cats: 1
Default

Like Braineack said earlier, if your O2 sensor is reading poorly it'll screw up your MS, regardless of a good fuel map. The LC-1 can be replaced with a Bosch part that I believe costs $60. Do a search on google, you can find the Bosch part number and just head down to autozone.
sicklyscott is offline   Reply With Quote
Old 03-04-2010, 01:19 PM   #25
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

yea did all that yesterday bosch #17014, thanks for all the info. still need to test it out today
jhad is offline   Reply With Quote
Old 03-04-2010, 03:20 PM   #26
Elite Member
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Just something i'd like to throw out there. If you have any exhaust leaks pre O2 sensor your sensor will read lean. You may even have leaks you cant hear.
wayne_curr is offline   Reply With Quote
Old 03-04-2010, 04:40 PM   #27
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

^^^that too.

sicklyscott, I actually if he turns ego off it wont use the o2 reading at all. I was suggesting that if his o2 was bad and giving bad reading and he richened the fuel map constantly more and more after each tune, and then once the car got hot and the AIT enrichments dumped in even more fuel it would run like crap.

My lc-1 failed this way, i kept making my tune richer and richer and richer because my sensor was on it's way out and giving me false readings.

This is how rich it got...I couldn't even finish the dyno pull:




I had to tune out the fuel by hand going off the dyno's WB after each pull, here's the progression:

Braineack is online now   Reply With Quote
Old 03-04-2010, 04:44 PM   #28
Elite Member
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

My wideband started showing very lean too the last time I was driving the car. I did have an exhaust leak though so i'm hoping that was the problem. It was showing so lean that I could idle the car at 17.5 afr and it wouldn't have any issues. It used to get iffy when I got above 14.5.
wayne_curr is offline   Reply With Quote
Old 03-04-2010, 05:43 PM   #29
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

then that's a leak...that's easy.
Braineack is online now   Reply With Quote
Old 03-04-2010, 05:57 PM   #30
Junior Member
iTrader: (1)
 
Join Date: Feb 2006
Posts: 196
Total Cats: 1
Default

Quote:
Originally Posted by Braineack View Post
^^^that too.

sicklyscott, I actually if he turns ego off it wont use the o2 reading at all. I was suggesting that if his o2 was bad and giving bad reading and he richened the fuel map constantly more and more after each tune, and then once the car got hot and the AIT enrichments dumped in even more fuel it would run like crap.
I was agreeing with you, I had the same issue which turned out to be a bad sensor, had nothing to do with MS at all until I tried to tune it out which was a bad idea.
sicklyscott is offline   Reply With Quote
Old 03-04-2010, 08:45 PM   #31
Junior Member
iTrader: (7)
 
Join Date: Aug 2006
Location: Binghamton, NY
Posts: 448
Total Cats: 1
Default

Surprised no one mentioned WB calibration as a possible culprit.
--Alex
AlexO35 is offline   Reply With Quote
Old 03-04-2010, 09:23 PM   #32
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

so with the new snesor things seem to be better so far, i have encountered what i believe is Lack of corrections for AIT bc i only saw a problem when i stopped to check out my ve table #'s and my AIT hit in the 130+ and it went super lean at idle, i shut it off then turned it on and it idled fine even though the AIT were still way up there. Im working on a new table. Any suggestions on ve values or AIT corrections, or well any suggestions welcome... i need to get this car done
jhad is offline   Reply With Quote
Old 03-05-2010, 12:10 AM   #33
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

Ok i was driving around with ego off and accel off and it is still slowly leaning out over time and if i turn off the car and turn it back on its fine for a little while
jhad is offline   Reply With Quote
Old 03-05-2010, 12:56 AM   #34
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

this is a datalog of when it leans on idle
Attached Files
File Type: msl gu.msl (116.6 KB, 43 views)
jhad is offline   Reply With Quote
Old 03-05-2010, 01:14 AM   #35
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

this is the new table ,under construction, for these datalogs
Attached Files
File Type: msq new.msq (32.3 KB, 66 views)
jhad is offline   Reply With Quote
Old 03-05-2010, 01:20 AM   #36
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

this is after the first datalog i turned the car off then back on
Attached Files
File Type: msl after gu.msl (1.60 MB, 42 views)
jhad is offline   Reply With Quote
Old 03-05-2010, 01:28 AM   #37
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

I noticed the gauges on my computer werent showing correct readings but the cars gauges were ok. it held at a specific map and/or rpm, first time its ever done this, it happened in tunerstudio
Attached Files
File Type: msl wtf.msl (416.9 KB, 33 views)

Last edited by jhad; 03-05-2010 at 01:52 AM.
jhad is offline   Reply With Quote
Old 03-05-2010, 09:43 AM   #38
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

which gauges? mat and clt?
Braineack is online now   Reply With Quote
Old 03-05-2010, 11:31 AM   #39
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

all of the gauges went wierd my rpm stayed below 2000 and went down when i accelled my clt said like 80 after it had just said 190+ my map went to 100kpa first then cam down and stuck at like 40kpa my ae pct started pegging my afr stuck lean it was all messed up but it didnt change how the car was running at the time
jhad is offline   Reply With Quote
Old 03-05-2010, 11:34 PM   #40
Newb
Thread Starter
 
Join Date: Jan 2009
Posts: 42
Total Cats: 0
Default

I think that was just a glitch with ts or something. But it still leans over time
jhad is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
91 1.6l turbo complete part out. Tony the Tiger Miata parts for sale/trade 63 12-29-2016 03:23 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
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 AM


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 09:35 AM.