is there any switch u can wire up to the stock ecu to switch maps cause i wanna get tuned for e85 after getting everything i need but not to many places have e85 so i wanted to be able to switch back to a 93 or 91 map when there is no e85 is this possible?

 

On 03-04 evos you can do it with the factory intercooler switch using the Tephra ECU ROM mod.

 

what is that and hot a source or url where i can get it, how about a how-to?

 

Check out the first post of this thread, paying particular attention to item #2
https://www.evolutionm.net/forums/al...ints-tips.html

 

thats good info but dont tell me how to wire the switch up and where u get the ecu rom or hot to do tune the ecu to work like that

 

Its all there...here is the specific link you need to the harness.

Here are the ROMs.

To keep tuning simple...tune your AFR to 12:1 (on a gasoline wideband) and use
MRFred's timing map . Can't get any easier than that.

I presume you have ECUFlash and EVOScan. And you will need larger injectors and a Walbro FP.