I don't recommend tuning out the throttle lag. Get a tune for sure, but the "lag" is there to prevent accidental engine lean. See ford (and every other manufacturer) has to mass produce vehicles that run in all types of conditions under all types of loads and other varibles. They also have to produce an engine calibration that will work under these circumstances, imagine how difficult it would be to tune every vehicle depending on the specific customers wants/needs.

 

I don't recommend any of you install a tune if you want to protect your warranty coverage but I doubt that any tune is going to alleviate the throttle lag 100%. Some of it is there intentionally (so I'm told) but I know some of it is a byproduct of all the thinking and processing that is involved with ETC. The "wheel-based torque demand" system (used by ford) is not as responsive or as similar to cable throttle as the japanese and german "pedal follower" system. Your accelerator is a torque command switch, so the PCM is told to deliver "x" amount of torque to the rear wheels regardless if that means opening the throttle all the way. Timing, fueling, VCT, throttle angle, et cetera are used to attain the desired wheel torque. It doesn't simply open the throttle 50% and half throttle. It is much more complicated than that. Basically, the PCM is playing big brother all the time and will try to turn each individual driver into it's version of how it thinks you want it to act. I know that doesn't make sense but the rpm hold during a shift is a perfect example. It will literally try to turn a crappy manual driver into a good driver by holding the rpms during a shift, that way there is less drivetrain stress when the clutch is engaged and it will save you fuel mileage.

 

A tune that is removed from the car prior to going to the dealership is undetectable. The only thing the dealer can see is that the computer has been accessed, and they can't deny warranty based on that.

 

that is an inacurate blanket statement. Your warranty will not be honored if it can be PROVEN that whatever mod you did caused your issue you might be having that had you bring the car in for service. also as far as tunes go, they can be removed before you go to a shop and the shop can not say a thing except that your computer is reading blank, like the battery was disconnected. With that you can say you disconnected the battery to reset the car. also it depends heavily on your dealer, allot of the Roush based, saleen based dealers encourage and sell mods and tunes, they also cover any repairs under your warranty....basically they just cant tell you your warranty is void....they have to prove it....which is harder than most think/

 

You can talk about warrantable proof all you want. If the modification in ANY way is realted to the engine failure, your coverage can and likely will be denied. Unless your tune says it will be removed after KAM reset, it can only be gotten rid of with another reprogram. Calibrations are calibrations and are burned into the PROM of the computer. a "tune" is an aftermarket calibration and PROM is programmable read only memory that will not be affected by a keep alive memory reset (battery disconnect). If you want to pay an lawer to argue your case you very well may get a settlement because of proof but most likely the fact that the defendent's legal fees will likely exceed your possible settlement - so yes, you MAY win. Otherwise all Ford has to do is have your PCM checked out and they can tell EVERY update/program it has ever had. Just because you CAN get away with murder does not mean you LIKELY WILL.

 

I tried this the other day. I didn't notice better response. What I did notice was that it reset my gas gauge to empty. After about 10 minutes of driving the gauge slowly returned to normal. I have an 06 V6 auto.

 

Exactly. No brake pedal, gas pedal song and dance will remove the throttle lag. The dealer can't tell what has been done to the computer if the tune is set back to stock. They can only tell it's been accessed.

 

I wonder what would happen if you did this but only pushed the accelerator 1/2 way to the floor each time. Would half throttle then be full throttle?? Better yet, would full throttle be 1.5 throttle! I'm not brave enough to try it, anybody game?