navmust

I have a 93 cobra that was running fine with 10 psi vortech, 42 pound injectors, 6 wire "Big Air" MAF, And an attachment chip...
I cureently removed my superchrager and chip, replaced 6 wire MAF and 42 pound setup with 24 pound injectors and matching 4 wire MAF setup..

I am very confused because my car will Idle fine without mass air being hooked up, but as soon as I hook it up, It stalls...

I know by not hookn it up the maf its supposed to run in some sort of safe mode or sumtin...

I did have it scaned and it pulled up code #66 - , MAF signal below minimum test voltage of .4vdc (O,M,R)

I checked the ground, and the 12v power.. That was good.
But the other pin Which is supposed to run at .6 volts at idle, runs way lower.. "code 66"

What can be the problem??
I checked different maf sensors, Diferrent maf 24# housings already... So I know the actual sensor and housing is good, I also cleaned the sensor part...

Please Help???