VX question

[benfrogg]

So, as I was doing some maintenance today i couldn't help but ponder two questions;
1. Is is possible to modify the stock ECU or modify the harness/ send a 12v+ signal to a specific pin or a ground, etc. so that lean burn is active all the time that a switch is on? I would like to experiment with lean burn at middle and full throttle instead of just the limited 1/4 throttle or less. It would be handy if you were on the highway and needed to ascend a small hill without losing lean burn. I'm thinking that if it was switched, you could use it like a "tow-haul" button featured on many GM trucks. (with the lean burn off)

I don't want to get into a new ECU. I don't have the scratch for that kind of work. I suppose excess heat might be an issue? Running that lean all the time at greater throttle? I also suspect that at some weight, rpm, etc that full time lean burn would HURT fuel economy. Examples would be during passing, hauling a heavy load, accelerating from a stop or up an on-ramp.

So, next question;
2. What are the negative ramifications of such a modification? Would this actually help FE? My thought is that right now in lean burn, pumping losses are greatly increased because I can only the throttle plate open a little bit. Further, in lean burn it's very difficult to get to high rpms (which is where most of the power is). With all time lean burn, I could reduce pumping losses in this way and get to higher revs when needed for climbing hills.


Obviously, this couldn't have been an option for a production car. Nobody even bothers to look at their temp gauges these days. Also, it likely would not want to be used during warm up either.
I'm thinking a shifter mounted push button would do the trick. Keep it close for passing and unexpected maneuvers.
I lack the technical expertise from the ECU side of it to figure this one out on my own.
Any thoughts?
Thanks
B