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Been asked before but with a new twist. Tuned car and warranty

Allentown

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Zelek

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Yolo.
 

choate

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If it’s determined the tune caused the engine failure then yes. For example if somehow it was running way too much timing or you used 87 oct on a 93 tune and ran it real hard then yeah but even that would be hard to prove.
 

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EFI

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If it’s determined the tune caused the engine failure then yes. For example if somehow it was running way too much timing or you used 87 oct on a 93 tune and ran it real hard then yeah but even that would be hard to prove.
Unfortunately Ford done not have to go *that* far to be able to say the tune caused damage and deny warranty. If they wanted to, all the would have to say is the calibration was not the original one and we can't honor the warranty. It could be the best/safest aftermarket tune in the world, even better and safer than their own tune. But if it's not theirs, then can legally say that they won't honor the warranty.

Will they? Most likely not, but they could easily deny warranty work purely on the basis of another tune being in the computer regardless of the actual parameters (fueling, timing etc.)
 

Bluemustang

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I don't blame you. If I had a 2018 car I wouldn't be tuning it based on the failures I've seen on this forum. Just keep it stock unless you have the money to fix it. It's already a very fast car as is.

Chances are a tune won't cause the failure but that doesn't mean you won't get screwed anyways.
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