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?

[JeffBowlsby]

You might also check the quality of the contacts in the harness connector to the AFM. Bent? Gapped? Corroded/dirty? It’s very common for the old original contacts to be worn out by now, negatively affecting connectivity . The contacts are two cantilever springs that separate due to 50 years of metal fatigue, in addition to dirt, corrosion and others contamination causing deteriorated connectivity.

[wonkipop]

You might also check the quality of the contacts in the harness connector to the AFM. Bent? Gapped? Corroded/dirty? It’s very common for the old original contacts to be worn out by now, negatively affecting connectivity . The contacts are two cantilever springs that separate due to 50 years of metal fatigue, in addition to dirt, corrosion and others contamination causing deteriorated connectivity.

yes.
and you are the man who would know. (IMG:style_emoticons/default/beerchug.gif)