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Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
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<blockquote data-quote="deadpool1" data-source="post: 441141" data-attributes="member: 21229"><p>nice photos, !! and jeep.</p><p>the ICM with ECU they make spark</p><p>fuses all good</p><p>must have 12vdc and ground to ICM</p><p> </p><p>the crank sensor must be good to the ECU</p><p>and then the ECU (Renix) sends spark pluses to the ICM I guess the ECU controls spark advance here.</p><p>I see you have the better HV spark coil , no horse shoe junk there.</p><p>how cool the original jack on fender, </p><p></p><p>ICM voltmeter to conn1 , A to B pin must be 12vdc cranking, of reads like 6vdc the resistor wire is blown out.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 441141, member: 21229"] nice photos, !! and jeep. the ICM with ECU they make spark fuses all good must have 12vdc and ground to ICM the crank sensor must be good to the ECU and then the ECU (Renix) sends spark pluses to the ICM I guess the ECU controls spark advance here. I see you have the better HV spark coil , no horse shoe junk there. how cool the original jack on fender, ICM voltmeter to conn1 , A to B pin must be 12vdc cranking, of reads like 6vdc the resistor wire is blown out. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
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