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My 2011 GT, with C&L Cold Air Intake (no tune) and Stainless Works 3" long tube headers and Cat'ed exhaust.

I'm getting a solid service engine soon indicator light, at 4000KMS, plus city driving is only getting 19L/100KMS, using all gears not walking on it. Any ideas? I thought cold air intake was supposed to increase you gas mileage? any ideas?
 

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i think that you should get a tune.
 

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Really?


U need a tune brother.... those headers are your issue. It engine must be running lean.
 

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+1 on getting a tune. Your issue is probably a what mine was when I installed my LT's w/ high flow Cats "catalyst below threshold". If I remember right they are codes P420 and P430 (left and right bank). When I ordered my tune/intake, I told them I had the LT's and High-flow Cats, but they did not turn off the rear O2 sensors so the light stayed illuminated. I called and had them retune w/ Rear O2's turned off and I have not seen the light since. Thank you BAMA and free tunes for life!
 
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