2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

CAI, Check engine light

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Old Apr 6, 2006 | 07:19 PM
  #1  
SierraMistBush's Avatar
SierraMistBush
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Default CAI, Check engine light

I just installed my CAI on my 05 V6...i was wondering how I oculd get the check engine light to go off? Is it just detecting the new extra air flow?? How can I get rid of the check engine light?
Old Apr 6, 2006 | 07:20 PM
  #2  
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Default RE: CAI, Check engine light

some CAI's require a tuner or it could damage your car.
Old Apr 6, 2006 | 07:43 PM
  #3  
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Traken
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Default RE: CAI, Check engine light

Which intake did you get?
Old Apr 7, 2006 | 05:22 AM
  #4  
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Default RE: CAI, Check engine light

I got a MAC CAI...i was wondering if the MAF sensor had anything to do with it? Should I take the CAI out and replace it with the stock??? Please help...thanks
Old Apr 7, 2006 | 08:20 AM
  #5  
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GT John
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Default RE: CAI, Check engine light

Its my understanding that the stock Mustang GT comes from the factory with the A/F at about 11.0 to 11.8. (mine was)

Replacing the stock air intake with a HP intake would have leaned out the A/F. How much it was leaned out can only seen on a Dyno. I would think that your A/F is probably in the 14's somewhere right now.

You really should put the car on a dyno and have them set the A/F. You will have to buy a "Tuner" so get ready to spend anywhere from $300 - $400.

As metioned above the only way to turn the "Check Engine" light out is with a hand held diagnostic tool.
Old Apr 7, 2006 | 02:17 PM
  #6  
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Default RE: CAI, Check engine light

Put it back to stock until you get your tuner.
Old Apr 8, 2006 | 12:09 PM
  #7  
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Default RE: CAI, Check engine light

Gotta tune it dude. This car is very sensitive to air flow (and the list keeps getting longer). Your hp probably went down instead of up.
Old Apr 8, 2006 | 08:03 PM
  #8  
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SierraMistBush
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Default RE: CAI, Check engine light

MAC is advertised as not having to be tuned...? I have noticed a horsepower gain, and nothing is running incorrect?? What now?
Old Apr 9, 2006 | 04:11 AM
  #9  
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Default RE: CAI, Check engine light

If it ain't broke, don't fix it. If you want to drop a few bucks and optimize you tune, I'm sure they could pull a few more ponies out of your engine. I'm not sure what the gains are for the MAC CAI though.
Old Apr 9, 2006 | 11:51 AM
  #10  
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GT John
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Default RE: CAI, Check engine light

Once again your A/F is way too high. (lean)

Your engine could be damaged.

That no tune CAI thing is a bunch of crap.

Buy a tuner from a shop that has a Dyno-Jet, get the car dyno'd, set the A/F's and have fun.

Later

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