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Old 07-19-2011, 03:30 PM   #1
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Tuning a 2011 Mustang 5.0?

I want to buy a Steeda Cold Air Intake but the website says that it is tune required and will not work without one. I know that it would void my warranty if i got a sct remote tuner and programmed the tune the company sent me. But if i put the stock tune back in before I took the car to the dealer would the dealer find out that I had previosuly installed another tune into the cars computer? Also would the tune be harmful to my engine and is it really true that the intake wont work without the tuner? Thanks alot

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Old 07-19-2011, 04:12 PM   #2
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Tuning a 2011 Mustang 5.0?

Even if you take the tune out before service the PCM will have a blank gap in it and they will know that it was in there.

I would ask your dealer about how they are for warranty if you would put the item on.

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Old 07-19-2011, 05:05 PM   #3
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Tuning a 2011 Mustang 5.0?

There's a counter on the pcm/ecm/ecu that gives historical information. Meaning if you re-calibrate the computer it pops up when the dealership scans the obd2 system.

Would the tune be harmful? On this particular engine (because it's running high compression and direct injection) it's likely that the tune makes the car run richer not leaner so it's probably not a problem. But that's up to you to find out through the manufacturer, not me. If it's running leaner you increase the possibility of lean seizing the engine.

The reason they "require a tuner" is probably 1)because they want to sell them to you and 2)because they don't want to affect reliability (as described above). Steeda isn't one of ford's main aftermarket partners so the last thing they want to do is have their parts damage engines and have the ford dealerships potentially pay for it.

If you want to maintain the warranty DO NOT add anything to the car for as long as you want to maintain that warranty. If you want performance parts only buy the FORD RACING parts and have them installed at the dealership so that maintain your factory warranty.
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Old 07-19-2011, 05:10 PM   #4
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Tuning a 2011 Mustang 5.0?

When I bought my 2011 mustang gt the dealer stated I could do basic mods like cold air intake and exhaust without voiding my warranty. Throttle body, lower intake manifold and cams would void it. As far as the tuner goes they said that was fine just take it out before bringing it in for service (they said it was just easier for them to work on them with the stock tune in it) and yes I asked one of the mechanics not a sales person. They did say specifically no chips because that is physically modifying the car's ECU where the tuner plugs in / out and just changes some of the parameters. This is what my dealership told me so I would check with yours first. Being harmful not sure I had one on 04 mustang for about 4 years with no problems but this is a new engine. As far as running a CAI with no tune I don't really know but I personally would get a tune if it says required. I've just did a axle back switch and SCT tuner on mine and it really woke it up. I don't really think I need CAI kit and honestly I didn't really feel that much of a difference on my 04 but again this is a new engine.
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