Originally Posted by 1SWTFCS
Does this leave a thump print on the ecu?
Sent from my iPhone using FF Mobile
Tunes won't leave a thumb print per say...If ford really wanted to get down to it they could hook up the ECU and find out if it had been "tampered" with but most dealers don't have this equipment in their service departments. If you are going in for an oil change or anything like that they'll never be the wiser.
Just don't mention you have a tune and don't leave the X3 in the car as it doesn't need to stay hooked up. And if you're that worried about it most tuners save the stock ECU tune in the memory bank so you can flash it back to "stock" if you so desire and that will "erase" any evidence of a tune..
I've had many cars tuned and never had dealers say anything about it... unless you grenade your engine or tranny it shouldn't be a problem. And most tuners like Tom won't build a tune that pushes the car to its limits. It is also much harder to grenade an NA tune because most bolt on mods will not change the A/F ratio much so timing and fueling can remain some what constant through the power band.
Mostly what I've gathered from what I've read about this tune is timing may be adjusted slightly and some of the throttle tables tweaked, but nothing major. A/F ratio and fueling will get adjusted to make the most out of any bolt ons but again unless Tom is pushing your A/F to the max and risking early detonation with a lean condition there isn't anything to worry about.
Again the benefit of a custom tune no engines operate 100% the same so this tune isn't for "big powa" but more driveability and ironing out the kinks all mass produced ECU's have.
Sorry for the lengthy post and reply but I've been lurking for the past few weeks since I bought my 13' SE hatch but I'm no stranger to building up cars. I haven't even tuned an NA model as I normally stuck with FI cars....
Thanks again Tom and everyone should be very happy as there aren't a lot of tuners out there that would take time to do custom for many customers nd keep lifetime updates with mods...