K-Jetronic System: Fuel Distributor Rebuild

bavbob

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So I purchased a 1979 323i and this system is new to me. I have been contemplating rebuilding the fuel distributor but the e21 forum has mixed reviews on the level of difficulty and also that the thing often leaks when rebuilt. I wanted to know if anyone has experience with this system and this type of project. I cannot get the thing to start when cold very well and have already confirmed the thermo time switch and cold start valve to function normally. Thing when started, runs waaay rich, like soaked plugs ( cold start injector is fine, not stuck). Tx
 
Center pin looks good, snug and smooth. The O-rings for the fuel pressure control valve spin freely and perhaps it cinches down when put back in place but that kinda tells me it is time to rebuild.
 
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