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]

love your work @nihil44

[tshih914]

love your work @nihil44

Thanks @wonkipop I do remember the old S hose was shot and I replaced it using the elbows. I went back to check the fuel pressure once I got it to start and idle at 2800 rpm. The gauge reads 28psi with vacuum hose connected and when pinched close reads 38psi so my fuel pump is working correctly.

Thanks @nihil44 for the compress air setup. I may try that.

@VanB how do you adjust the AFM (you mentioned 1-1/4 turns out in the throttle idle adjuster screw and AFM screw was 3 turns out.) Where is this screw on the AFM located?

[wonkipop]

love your work @nihil44

Thanks @wonkipop I do remember the old S hose was shot and I replaced it using the elbows. I went back to check the fuel pressure once I got it to start and idle at 2800 rpm. The gauge reads 28psi with vacuum hose connected and when pinched close reads 38psi so my fuel pump is working correctly.

Thanks @nihil44 for the compress air setup. I may try that.

@VanB how do you adjust the AFM (you mentioned 1-1/4 turns out in the throttle idle adjuster screw and AFM screw was 3 turns out.) Where is this screw on the AFM located?

@tshih914
beaudy. at least we can tick off the fp as A O K. (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/beerchug.gif)
regulator and pump.