Banana pi m1+ xppt2046

Hello i have a banana PI M1+ i am using android 4.2.2 and it works great on my 18" monitor but when i try to use it with my 5" monitor it doesnt work it comes out as 1/4 of the screen (Top Left) once it loads up it goes all funny and really stuff up:( im using a xpt2046 monitor it is touch screen but i dont need the touch screen to work i plan on using it in the dash of my 4WD and really need it working within 12hrs as im going to a 4wd show.