1974 1.8L engine fast idle then stalls, Fuel injection issues Options

[tshih914]

My 1.8L 914-4 with stock Bosch L?-Jetronic FI after being stored several years started to develop a hard to start problem. When finally started would stall when I give the gas pedal any input to raise the revs. I suspect there was some kind of intake air leak and while fiddling around had a backfire which blew the AF meter which I had Pelicanparts repaired. After replacing the fuel lines with the stainless ones from Tangerine Racing and flushing out the fuel system with Techron the engine started to run normally for a short time. Now the engine can be started and fast idles at 3000 rpm but again any input to rev up the engine results in stalling. The idle adjustment screw at the base of the throttle housing is fully closed. Any suggestions on how to fix?

[wonkipop]

@Van B .

i think he has got it right.
he seems to have removed the hose between the decel valve and the Y junction.
the route for air to be drawn into the decel valve.
and he has capped the decel valve and the Y junction.
which means the decel valve can't draw air and the boot is sealed.
thats if i am reading his photo correctly?

i don't see any uncapped hoses to plenum in the photo.
so long as he has taken the hose out i understand he has it should be isolating the decel and stopping the air route and not leaving anything open.