Still reading too much American sites and relying on ebay fitment. Regardless of engine be it an E like yours or an F that does use a lambda sensor its not not a cause of high idle.
High idle is too much air
Basics of K jet. Number one reason for is air leaking past the injectors. Replace all 8 injector seals. Must use K jetronic seals not seals for F engines.
The check inlet manifold gasket for leaks and replace gasket if needed. After that check all pipes etc for leaks.
Only once you have done all that you can adjust the idle speed on the thumb screw and if needed adjust the mixture. DO NOT ADJUST THE MIXTURE BEFORE FIXING ALL AIR LEAKS AND HAVING IGNITION SYSTEM WORKING PERFECTLY!!!
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