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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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<blockquote data-quote="deadpool1" data-source="post: 439563" data-attributes="member: 21229"><p>most intermittent do not self heal, the go to worse and dead. and now 10x more easy to find</p><p>spark loss (if true x4) has many causes. even 1 wire loose. (bad grounds to PCM?)</p><ol> <li data-xf-list-type="ol">IGN switch bad/</li> <li data-xf-list-type="ol">bad ICM . fire wall ign module.</li> <li data-xf-list-type="ol">02 heater shorting (intermittently) 02 heater wires hitting exhaust pipe and shorts, just unplug it and drive wires safe'd off. easy no?</li> <li data-xf-list-type="ol">1-injector power wire shorts or there wires at INJ, orange wire.</li> <li data-xf-list-type="ol">HV spark coil primary wire shorts. the coil bad or its feed 14YL wire shorts. pdf pages 1870+</li> <li data-xf-list-type="ol">the GEN has 15ohm protection resistor to not overload 14YL ign run power feed.</li> <li data-xf-list-type="ol">CMP or CKP bad. (CPS =CKP) CMP is distributor trigger sensor. Distrib wires top pin B of ICM.</li> <li data-xf-list-type="ol">bad PCM.REMIX.</li> <li data-xf-list-type="ol">bad grounds at any of EFI devices.</li> <li data-xf-list-type="ol">14YL (means 14 gauge yellow) goes to idle speed disconnect too. this is a dealer installed A/C device. ,just unplug it.</li> <li data-xf-list-type="ol">A new distributor maybe the only cure. it has a model called sync signal generator ( we call it CMP today) cam signal pick up coil,etc. if dead ,that TBI injector goes dead this sensor sets 1,3,4,2 injector firing order. it can even misfire for sure the CMP tone ring inside filthy. called pulse ring, ch.8D</li> </ol><p></p><p>the car uses FSM wiring sheet code 80/81 wrangler, all else , not this car.</p><p></p><p>TBI throttle body injector (1) aka, single point Injection. here is the IGN switch 14YL is the feed that because spark. (or fuel)</p><p>[ATTACH=full]121839[/ATTACH]</p><p></p><p>14YL goes here. and spark from ICM. we do no want opens on 14YL main feed or any kinds of shorts, cruising.</p><p>[ATTACH=full]121840[/ATTACH]</p><p>this post is for loss of spark cruising only. by no means fully exhaustive.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439563, member: 21229"] most intermittent do not self heal, the go to worse and dead. and now 10x more easy to find spark loss (if true x4) has many causes. even 1 wire loose. (bad grounds to PCM?) [LIST=1] [*]IGN switch bad/ [*]bad ICM . fire wall ign module. [*]02 heater shorting (intermittently) 02 heater wires hitting exhaust pipe and shorts, just unplug it and drive wires safe'd off. easy no? [*]1-injector power wire shorts or there wires at INJ, orange wire. [*]HV spark coil primary wire shorts. the coil bad or its feed 14YL wire shorts. pdf pages 1870+ [*]the GEN has 15ohm protection resistor to not overload 14YL ign run power feed. [*]CMP or CKP bad. (CPS =CKP) CMP is distributor trigger sensor. Distrib wires top pin B of ICM. [*]bad PCM.REMIX. [*]bad grounds at any of EFI devices. [*]14YL (means 14 gauge yellow) goes to idle speed disconnect too. this is a dealer installed A/C device. ,just unplug it. [*]A new distributor maybe the only cure. it has a model called sync signal generator ( we call it CMP today) cam signal pick up coil,etc. if dead ,that TBI injector goes dead this sensor sets 1,3,4,2 injector firing order. it can even misfire for sure the CMP tone ring inside filthy. called pulse ring, ch.8D [/LIST] the car uses FSM wiring sheet code 80/81 wrangler, all else , not this car. TBI throttle body injector (1) aka, single point Injection. here is the IGN switch 14YL is the feed that because spark. (or fuel) [ATTACH type="full"]121839[/ATTACH] 14YL goes here. and spark from ICM. we do no want opens on 14YL main feed or any kinds of shorts, cruising. [ATTACH type="full"]121840[/ATTACH] this post is for loss of spark cruising only. by no means fully exhaustive. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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