Check engine light after installing K&N air filter and removing carbon traps.

[Jsun]

Driving home today and got this. Pulled the traps out and added the K&N drop in filters a couple of weeks ago and haven’t had any problems until today. Temps were high and the light came on during hard acceleration and high speed. Anybody else have this issue ? Anybody know what the dealer is going to say if they see the traps removed ?

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[RLE55]

Looks like your A/F mixture is off, which could make sense removing the traps and adding less restrictive cone filters. Would think the PCM would adjust, but maybe not.

 

[roadpilot]

Check for loose or disconnected wires/cables.

 

[Zig]

Check for loose or disconnected wires/cables.

Also backwards maf? Or seals. Some emission tests take 50 or so miles before completed, if you disconnected your battery when you did the install.

 

[Lightningwings]

Did the K&N air filter instructions tell you to remove the carbon traps? If so, reach out to K&N Support and let them know your issue. They should help you resolve it.

 

[thelostone]

Dealer gonna blame it on the carbon trap removal ..deny any warranty repair watch

 

[Vapor Blue GT]

Did you get this figured out?

 

[Jsun]

Did you get this figured out?

Yes. I pulled everything out and cleaned it and the light went out. I looks like the K&N's don't do a great job of of keeping small particles out. Looking for alternatives.

 

[erocker]

Most likely too much oil on them.

 

[728Autos]

K&N = Junk

 

[JPGC_S650]

Most likely too much oil on them.

A lot of the time they do from the factory (K&N). I usually wrap the brand new filters with a shop rag on the outside of the filter for a little while before installing to soak up the extra oil when they are new/freshly oiled.

 

[Skye]

https://www.steeda.com/steeda-555-3219-ford-mustang-gt-dark-horse-high-flow-air-filters-pair

Above is one option. The price, $149.00, is for a pair (2). The filters are non-oil and washable.

Air Raid's site does not list a S650 filter. Ford Performance does not list am S650 filter. They've partnered past and created an S550 non-oil and washable filter. I'd think they will for the S650. An e-mail to either business might get some feedback on development schedules.

The one they produced for the S550 is a good weight, well-constructed and uses a cotton gauze media.

 

[Zengineer]

• 
  

• Driving home today and got this. Pulled the traps out and added the K&N drop in filters a couple of weeks ago and haven’t had any problems until today. Temps were high and the light came on during hard acceleration and high speed. Anybody else have this issue ? Anybody know what the dealer is going to say if they see the traps removed ?
  
  

  

  I guess to me the question is: what exactly were you trying to remedy or accomplish by removing the carbon traps and adding an oiled air filter. Have other modifications been made?

 

[robvas]

In all my years I've never seen a K&N foul a MAF straight out of the box...

 

[REV745DH24]

Yes. I pulled everything out and cleaned it and the light went out. I looks like the K&N's don't do a great job of of keeping small particles out. Looking for alternatives.

Recommend Steeda Blue Air Filter which may filter more particles than K&N filters.

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