Closed loop breaking up - Page 3 - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

Notices
EcuFlash
Sponsored by:
Sponsored by:

Closed loop breaking up

Reply

 
 
 
Old Jun 20, 2017, 01:28 AM
  #31  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
Originally Posted by mines5 View Post
With no data on the table i can pretty much that either your injectors or map sensor might be faulty.

- Did you notice the volts while the car was running rich ?

I've got the MAP sensor logged. It could definitely be the scaling though. It seems to be outputting a good number in the log, but it's not an officially supported MAP sensor. Corbin (my tuner) made a scaling for it that he said would work though. It's a GM 4 bar. I can't run a standard Evo map sensor because the JDM manifold doesn't have a provision for it. Tuning SD is one of those places where my knowledge is still lacking, so I'm not sure how to tell if the MAP sensor scaling could be the issue.
Alchem1st is offline  
Reply With Quote
Old Jun 20, 2017, 03:20 AM
  #32  
Evolved Member
 
mines5's Avatar
 
Join Date: Oct 2010
Location: Streets of willow
Posts: 744
Thanked 14 Times in 14 Posts
Now you are talking. Can you post up a pic of your intake manifold and bin file if your tuner doesn't have an issue?
mines5 is offline  
Reply With Quote
Old Jun 20, 2017, 03:24 AM
  #33  
Evolved Member
 
mines5's Avatar
 
Join Date: Oct 2010
Location: Streets of willow
Posts: 744
Thanked 14 Times in 14 Posts
Can you fit a jdm evo 7 intake manifold ?
mines5 is offline  
Reply With Quote
Old Jun 20, 2017, 07:59 AM
  #34  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
Here's how I have it set up currently:


I'll probably pick up a GM 3 bar MAP since the scaling for that one has been set up in ECUFlash already and I've got the rest of the car set up to run a GM style MAP. It's just this oddball GM 4 bar that doesn't have a proper scaling. Basically this is an Omnipower GM 4 bar MAP. I had originally assumed that the Evo Omnipower 4 bar MAP would have the same scaling when I ordered it. When I got the car to the tuner I found out this wasn't the case. He said it would work though and made a scaling for it using custom "SD MAP Sensor VE and Calibration" numbers and the setting for the Omnipower Evo style 4 bar. I think it's definitely a possibility that that's what the problem is. The bin file is the standard one for Tephra v7. No custom scripts added.
Alchem1st is offline  
Reply With Quote
Old Jun 20, 2017, 08:10 AM
  #35  
Evolved Member
 
mines5's Avatar
 
Join Date: Oct 2010
Location: Streets of willow
Posts: 744
Thanked 14 Times in 14 Posts
Aah Great ! Hopefully this will resolve the issue. Fingers crossed.
mines5 is offline  
Reply With Quote
Old Jun 20, 2017, 08:12 AM
  #36  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
Originally Posted by mines5 View Post
Aah Great ! Hopefully this will resolve the issue. Fingers crossed.
Yep, we shall see! I'll order one when I get back from Pikes Peak. The PPIHC race is this weekend and I'm driving out there with a buddy of mine for it.
Alchem1st is offline  
Reply With Quote
Old Jun 22, 2017, 06:49 PM
  #37  
Newbie
iTrader: (3)
 
Join Date: Jun 2010
Location: East TN
Posts: 58
Thanked 3 Times in 3 Posts
I second the MAP sensor! Had a very similar issue before. Either way good luck and let us know what you find!!
Ians06 is offline  
Reply With Quote
Old Jun 22, 2017, 06:50 PM
  #38  
Newbie
iTrader: (3)
 
Join Date: Jun 2010
Location: East TN
Posts: 58
Thanked 3 Times in 3 Posts
Also do you think setting the car up to just run on open loop just to see what it does may help you narrow it down?
Ians06 is offline  
Reply With Quote
Old Jun 23, 2017, 07:06 PM
  #39  
Evolving Member
iTrader: (15)
 
sandman121383's Avatar
 
Join Date: Nov 2009
Location: Pa
Posts: 124
Thanked 1 Time in 1 Post
Just a thought. You mentioned you deleted your pcv, and added a catch can. That's great but if done incorrectly then that's your issue.

did you not add a check valve to the catch can loop? If not then it's a vacuum leak, so at cruise your fueling is all over because of that.

What are your trims like? I suggest putting the pcv back. You should have a line from your intake manifold going to the can and also another from your pcv going to it. And cap the vent. This way you don't bleed crankcase pressure.

Hope this input helps, something mechanical cannot be diagnosed over a computer, but it's an idea for you! Good luck!
sandman121383 is offline  
Reply With Quote
Old Jul 5, 2017, 04:40 PM
  #40  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
PROGRESS HAS BEEN MADE. So today I realized that my fuel trims and my timing advance are both bouncing around consistent with the misfire. Tried unplugging the knock sensor and the CAS to see if it would make a difference and nada. Timing advance is jumping between 5 and 18 degrees on the log. That would DEFINITELY make the engine react the way it is. Just gotta figure out why now...

Log is attached
Attached Files
Alchem1st is offline  
Reply With Quote
Old Jul 27, 2017, 01:02 PM
  #41  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
Changed the map sensor to an AEM 3.5bar unit and had my tuner set up the rom for it. Still have the same issue. Did a leak down test as well. All cylinders had less than 5% leakdown, however, I did notice that there's a bit of oil and a LOT of carbon on the piston tops. Definitely not normal for an engine with 3k miles on it since new. (this could also affect the leakdown test) Maybe the car is oil fouling from a leak or something. Intercooler is dry, so it shouldn't be the turbo, and I checked my valve seals as well. I seafoamed the cylinders directly and let them soak for an hour before drying them back out and reassembling the car. No change to how the car runs; but the piston tops look much better. Next I'll scope the intake manifold through the injector holes and see what I find. Shot a more concise video of the issue as well. Here it is:

Alchem1st is offline  
Reply With Quote
Old Jul 27, 2017, 09:28 PM
  #42  
Evolved Member
 
mines5's Avatar
 
Join Date: Oct 2010
Location: Streets of willow
Posts: 744
Thanked 14 Times in 14 Posts
If it is doing this only on idle and not on cruise and WOT runs then you should bare with it

and drive the car. Over the time if it gets worse then it will show up which part is causing this problem and easier to identify.
mines5 is offline  
Reply With Quote
Old Jul 28, 2017, 01:15 PM
  #43  
Evolving Member
Thread Starter
iTrader: (2)
 
Alchem1st's Avatar
 
Join Date: Sep 2009
Location: Indianapolis
Posts: 227
Thanks: 0
Thanked 1 Time in 1 Post
Originally Posted by mines5 View Post
If it is doing this only on idle and not on cruise and WOT runs then you should bare with it

and drive the car. Over the time if it gets worse then it will show up which part is causing this problem and easier to identify.
The problem is that is DOES do this cruising. The car kicks and bucks all over. Makes the car nearly undrivable and ruins the experience. It really beats you up! I did make another small discovery today. If you look in the video when the car gets up around 4k rpm the wideband is showing super rich in the 11.0-12.0AFR area. In the tune it's supposed to still be at a stoic 14.7AFR. I think this might be a big piece to the puzzle. Tried shortening the vacuum line from the MAP sensor just to see if it made a difference. It didn't other than tidying up the engine bay a bit.
Alchem1st is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wang4u
Evo Engine / Turbo / Drivetrain
10
Jun 22, 2017 12:45 AM
Projectjdm
Evo X General
0
May 31, 2017 12:00 PM
jb2zero0six5
EcuFlash
3
Aug 3, 2016 12:59 AM
lancerrally45
EcuFlash
15
Jun 15, 2016 12:25 PM
Dr. Jekyll
Evo X Engine Management / Tuning Forums
3
Apr 1, 2016 08:42 AM


Thread Tools
Search this Thread
Quick Reply: Closed loop breaking up


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.