Air/Fuel ratio adjustment? - Jeep Compass Forum
 
LinkBack Thread Tools Search this Thread
post #1 of 6 Old 03-14-2016, 09:45 PM Thread Starter
Member
 
Join Date: Jul 2014
Location: Buffalo NY
Posts: 92
 
Exclamation Air/Fuel ratio adjustment?

Hey Guys,

I had recently installed install a Magnaflow cat-back exhaust system on my 2014 Jeep Compass - 2.4l 6-speed automatic.
I'm loving every bit of it, however my vehicle has been running leaner on fuel. I also have a K&N cold air intake.
Obviously this vehicle is not tuned to have this much air coming in and exiting quicker... The back pressure is practically gone...

Does anyone know how to adjust the Air/Fuel ratio?
Does this require a tune or can it be done with a programmer?

At idle, it runs about 2-4% Lean , and higher RPMs between gears it goes all the way up to 12% at times. Once at highway speeds in the 6th gear, it usually goes back down to about 2-4% lean.

Please let me know
Robxstone is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 03-14-2016, 09:48 PM Thread Starter
Member
 
Join Date: Jul 2014
Location: Buffalo NY
Posts: 92
 
I should add, there are no codes. I've ran it for about 500 miles with this new set up, no Check engine light or codes hidden in the system... should i not even worry about it?
Robxstone is offline  
post #3 of 6 Old 03-14-2016, 10:48 PM
Senior Member
 
tripplec's Avatar
 
Join Date: Mar 2010
Location: Belleville, ON, Canada
Posts: 1,897
 
All modern vehicles have computer managed fuel systems.

Jeep Compass 2009
4x4, 2.4L, CVT
North Edition
heated seats, TPMS
General Altimax RT43 P225/65R17
Yellow Fog Lamps
CLASS III Curtis Hitch
SOLD @ 153,000km Oct. 2018 THE END !!
Belleville, Ontario, Canada

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tripplec is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old 03-15-2016, 12:13 PM Thread Starter
Member
 
Join Date: Jul 2014
Location: Buffalo NY
Posts: 92
 
Yea, lol.. I'm aware... however the vehicle still hasn't adjusted itself which I'd imagine still requires a tune of some sort. Before the upgrades, it never ran lean or rich.
Maybe resetting the engine computer?

Appreciate the input
Robxstone is offline  
post #5 of 6 Old 03-15-2016, 02:13 PM
Senior Member
 
tripplec's Avatar
 
Join Date: Mar 2010
Location: Belleville, ON, Canada
Posts: 1,897
 
Yeah resting the engine relearning again might do it. I don't recall the exact process. Something with the gas peddle though. Somewhere in the forum.

Jeep Compass 2009
4x4, 2.4L, CVT
North Edition
heated seats, TPMS
General Altimax RT43 P225/65R17
Yellow Fog Lamps
CLASS III Curtis Hitch
SOLD @ 153,000km Oct. 2018 THE END !!
Belleville, Ontario, Canada

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tripplec is offline  
post #6 of 6 Old 03-15-2016, 11:58 PM Thread Starter
Member
 
Join Date: Jul 2014
Location: Buffalo NY
Posts: 92
 
Hey thanks dude!!! Found this : ECU Re-learn Procedure (without disconnecting battery!) - Jeep Patriot Forums im gonna give it a try
Robxstone is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Compass Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome