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]

where i am going with my thinking @Van B is

1. to get this poor old girl to idle without either the decel valve or the AAV being part of the picture. neither are needed for normal warm idle.

2. to see if he can get a warm idle using the idle screw. at around 1000 rpm.

3. do the gassing thing.

trying to get this high idle thing out of the picture if possible.

realise there are a whole lot of things need for stable warm idle.
not least
correctly adjusted valves.
correctly set timing.

if it won't transition to opening the throttle from that state of warm idle.
well?
there is a few thoughts that come to mind.

also if he can't get it down to stable low warm idle and it starts to hunt around as you screw it down it could indicate there are some air leaks. and these will be unmetered air leaks. but want to get these "legit" air routes out of the picture because they are masking whether it will do a normal warm idle.