Lean Condition - MustangForums.com

Notices
5.0L V8 Technical Discussions Any questions about the 'Coyote' engine, transmission, exhaust, tuners/CAI, or gearing can be asked here!

Lean Condition

Reply

 
 
 
Old 10-22-2017, 05:34 PM
  #1  
swodo
Thread Starter
 
Join Date: Feb 2010
Location: MN
Posts: 31
Default Lean Condition

My new to me 2011 GT throws a lean condition code under medium to hard accelleration. I cleared the code and cleaned the MAF sensor-all I could think of.
Haven't had a chance to test it yet. Do you think a dirty MAF might have been the problem. I have all of three days left on the dealer's 10 day warranty.
Advice please?
swodo is offline  
Reply With Quote
Old 10-25-2017, 05:15 PM
  #2  
swodo
Thread Starter
 
Join Date: Feb 2010
Location: MN
Posts: 31
Default

My mistake. It's a 30 day warranty. Anyway, the CEL came back on and I again scanned a lean code. However the CEL went out by itself but I still scan a lean code and also now a stuck O2 sensor code. The CEL checks OK at startup. What would cause the CEL to turn off without being cleared?
swodo is offline  
Reply With Quote
Old 10-28-2017, 07:18 AM
  #3  
bodon
 
Join Date: Dec 2014
Location: wisconsin
Posts: 2
Default

Did anyone put a bigger air intake on and not adjust the tune to compensate? That will show a lean condition.
bodon is offline  
Reply With Quote
Old 10-28-2017, 04:39 PM
  #4  
swodo
Thread Starter
 
Join Date: Feb 2010
Location: MN
Posts: 31
Default

As far as I know its stock. BTW, does a stock 2011 GT air cleaner box say "cold air intake"?
swodo is offline  
Reply With Quote
Old 10-29-2017, 11:25 AM
  #5  
P51C
2nd Gear Member
 
Join Date: Mar 2012
Location: BC
Posts: 364
Default

Yes, the box says CAI, because it actually is. Have a look between the MAF and throttle body for any air leaks. Additional air entering here will be unmetered and cause this. Both banks lean? That means it is something they share, like TB, air tube, maf sensor gasket...Don't forget the vac line fitting(s) on the intake tube, both ends are sources of unmetered air, potentially.
P51C is offline  
Reply With Quote
Old 10-29-2017, 02:20 PM
  #6  
swodo
Thread Starter
 
Join Date: Feb 2010
Location: MN
Posts: 31
Default

Thanks, I'll chech it all out.
swodo is offline  
Reply With Quote
Old 10-29-2017, 02:52 PM
  #7  
bodon
 
Join Date: Dec 2014
Location: wisconsin
Posts: 2
Default

Originally Posted by swodo View Post
As far as I know its stock. BTW, does a stock 2011 GT air cleaner box say "cold air intake"?
I can't say about a 2011. I have a 14.
bodon is offline  
Reply With Quote
Reply
 
 
 

Forum Jump

Thread Tools
Search this Thread
Advertising
Featured Sponsors
Vendor Directory