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Jeep Wrangler YJ
YJ General Discussion
Jeep yj crank but no start
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<blockquote data-quote="deadpool1" data-source="post: 439411" data-attributes="member: 21229"><p>NO car told , just YJ, <strong><em>can I buy a year???????????? so i can read you FSM pages to you and not lie?</em></strong></p><p><strong><em>2.5Liter engine or?</em></strong></p><p>did you check<strong><em> all</em></strong> fuses first.? the PCM must have full DC 12vdc power to run all sensors. okay?</p><p>fuse 1 and 5 not blown, at least. at PDC</p><p></p><p></p><p>it stalls and spark ended, so #1 reason for that is ASD relay is not staying engergized.</p><p>what reader was that<strong><em><span style="color: rgb(65, 168, 95)">, love to know that? </span></em></strong> plugged in where, the PCM ,box, side plug DLC?</p><p>02 shorts the PCM drops the ASD like hammer,</p><p>ECT sensor , wires bad or it is bad, IAt SENSOR SAME, </p><p>iD SAY WIRING TO BOTH BAD, OR THE Voltage to it wrong or dead. power pin on them dead.</p><p>there are like 8 reasons, ASD goes off line, i made page to show them all</p><p></p><p>all I know is YJ jeep and not the old 87 carb.</p><p>here is my 95 page on ASD, it condenses 3 books and vast pages to 1 page, why does ASD go offline, also swap it and horn relay they are the same.</p><p></p><p>I will now answer the why question</p><p>the PCM does not allow the car to catch fire is why, called crash and burn</p><p>if the PCM sees gross errors on the output side of the ASD , this is called overload and it shuts down the ASD.</p><p>all EFI gas car engines made do this, on Jeeps it ASD, (the name) and by law. Ever see a car fire,,fuel fed, it is not a pretty site.</p><p>if the PCM detects spark bad, it cuts fuel fully, via disabled injectors and on this jeep if ASD drops, spark and fuel pump are now dead.</p><p>by 100% design and by USA laws (on topic) study how EFI works.</p><p></p><p></p><p>the 3 sensor bad , just a bad ground to all 3 will make them all read high voltage (wrong)</p><p>the ground on mine is called S114, (schematics page FREE FSM)</p><p>this bad kills dead too, the CMP</p><p>G104to PCM? bad? goes to 3 PCM ground pins, and must be good or all sensors go dead. </p><p>if G104 good and all fuses good the PCM then sends its own sensor ground to S114 feed (gnd)</p><p>S114 runs the crank sensor too, and not both are dead, CMP and CKP and by pure logic there can be no spark ever.</p><p>the PCM sends 8vdc (reg) to other sensors. crank ,CAM and speed VSS. on my 95. YJ</p><p>S113 and S114 are created by the PCM , so the PCM grounds (all) and fuses must be good or none of this EFI stuff will work. at all</p><p></p><p>[ATTACH=full]121778[/ATTACH]</p><p></p><p>[ATTACH=full]121779[/ATTACH]</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439411, member: 21229"] NO car told , just YJ, [B][I]can I buy a year???????????? so i can read you FSM pages to you and not lie? 2.5Liter engine or?[/I][/B] did you check[B][I] all[/I][/B] fuses first.? the PCM must have full DC 12vdc power to run all sensors. okay? fuse 1 and 5 not blown, at least. at PDC [B][I][/I][/B] it stalls and spark ended, so #1 reason for that is ASD relay is not staying engergized. what reader was that[B][I][COLOR=rgb(65, 168, 95)], love to know that? [/COLOR][/I][/B] plugged in where, the PCM ,box, side plug DLC? 02 shorts the PCM drops the ASD like hammer, ECT sensor , wires bad or it is bad, IAt SENSOR SAME, iD SAY WIRING TO BOTH BAD, OR THE Voltage to it wrong or dead. power pin on them dead. there are like 8 reasons, ASD goes off line, i made page to show them all all I know is YJ jeep and not the old 87 carb. here is my 95 page on ASD, it condenses 3 books and vast pages to 1 page, why does ASD go offline, also swap it and horn relay they are the same. I will now answer the why question the PCM does not allow the car to catch fire is why, called crash and burn if the PCM sees gross errors on the output side of the ASD , this is called overload and it shuts down the ASD. all EFI gas car engines made do this, on Jeeps it ASD, (the name) and by law. Ever see a car fire,,fuel fed, it is not a pretty site. if the PCM detects spark bad, it cuts fuel fully, via disabled injectors and on this jeep if ASD drops, spark and fuel pump are now dead. by 100% design and by USA laws (on topic) study how EFI works. the 3 sensor bad , just a bad ground to all 3 will make them all read high voltage (wrong) the ground on mine is called S114, (schematics page FREE FSM) this bad kills dead too, the CMP G104to PCM? bad? goes to 3 PCM ground pins, and must be good or all sensors go dead. if G104 good and all fuses good the PCM then sends its own sensor ground to S114 feed (gnd) S114 runs the crank sensor too, and not both are dead, CMP and CKP and by pure logic there can be no spark ever. the PCM sends 8vdc (reg) to other sensors. crank ,CAM and speed VSS. on my 95. YJ S113 and S114 are created by the PCM , so the PCM grounds (all) and fuses must be good or none of this EFI stuff will work. at all [ATTACH=full]121778[/ATTACH] [ATTACH=full]121779[/ATTACH] [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Jeep yj crank but no start
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