I give up...having to Ford vehicles with 5.7 engines, I purchased 2 Maxenergy Tuners. What a waste of money. To start with, the tuners require a download and after doing so an error messages is given to the effect that they wont work with that engine. So after I spend a great deal of time with the fellow who sold my last one to me, on the telephone with HyperTech, we down load the program for the 4.6 engine and low and behold, the vehicle and the tuner "mate". I know what a 5.7 engine looks like and I know I have them. I'm traveling this next week and thought I'd tune my 05 SCrew for performance, didnt change any peramiters, just tuned for performance on a 200 mi round trip. The mpg's dropped by 5/10ths, the truck sounded like a "thrashing machine", and transmission shifts were horrible. Detuned it for the same trip yesterday. Engine sounded better, no problems with the transmission, and fuel consumption went back to where it had been prieviously
I'm telling you all this because I know every now and then there are questions about tuners and what to buy. Can't suggest what to buy, but sure as hell can suggest what not to buy.

 

are you serious?

Ford doesn't have, nor have they ever offered a 5.7 liter engine. That is the Chevy 350, and most recently the LS1 engine.

Ford however, has a 5.8 liter 351. Or since you are posting this in the 2004-2008 Forum, you are actually talking about the 5.4 liter 331 motor.


If your trucks have the 5.4 installed, no wonder the programmer made the engine go crazy. I don't even know how you got it to work. The 4.6 2v motor and the 5.4 3v are different animals and they operate using completely different PCM strategies.




You are experiencing a case of "User Error" and that is why many people should not be touching or operating certain electronics. I suggest you count yourself lucky you didn't fry the PCM or damage you motor. Hypertech isn't the best out there, but they make an okay product.

 

Wow.



Just when I thought what engine I had, you went an reduced me by .3 liters.

 

I've had a Max Tuner for over 3 years and the only problem that I have had is a slight clatter when the engine is almost warm. It does the same on the factory tune though. I run the premium tune because it has noticably more power when on a grade and doesn't downshift as much. I carry alot of tool and material so gas mileage never goes above 16 if that. But for a "canned" tune I think it is okay. Which tune did you use?

 

hey guy's I have an evolution programer for 2 years now with 3 factory program levels and it runs grate on all levels and one of the features i like the most is the scan tool also use it to correct the speedometer for diffrent size tires and you can visualize over 20 diferent aspect of engine or drive train good toy to play with if you know your limits