96 shut of at 2800 to 3000 rpm
 

96 k3500 automatic

new injection pump, new pmd, new fuel filter and lift pump return line clear supply line ok

truck fires up and idles fine no load or loaded throotle up to 2800 rpm and it shuts off as if key turn off have to turn key off to get it to fire up im at witts end im leaning towards ecm
also no codes

thanks