Green drop in filter and MBRP cat back exhaust, am I ok running without a tune?

[madsedan]

I may buy a tune and AP in the spring but I'm really happy with the car right now, wait until I get bored before the next upgrade.
I run only 93 octane but want to make sure it doesn't get too lean or throw a CEL.

 

[CanadianGuy]

You will be fine. No tune required. The base software in the Fiesta adjusted quite well to better fuel and air. It simply is not as aggressive as tunes.

 

[OffTheWall503]

A tune isn't required, but will provide the maximum gains out of those modifications.

 

[madsedan]

Got it, I know 18 would be very beneficial but I would like to get the car into early next year to ensure there are no warranty issues before plugging a tune up to the car.


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[CanadianGuy]

Got it, I know 18 would be very beneficial but I would like to get the car into early next year to ensure there are no warranty issues before plugging a tune up to the car.


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If you want a tune or other warranty friendly parts. Look at Mountune / Ford Racing. The mountune MP215 is a tune and CAI that is Ford Warranty approved. It is pricey but you get the piece of mind and a CARB approved product. Other parts from Mountune are also warranty friendly like the short shifter.

 

[Based]

Please get a tune. It's so worth it man. I recommend Stratified.