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Jeep Wrangler YJ
YJ General Discussion
Fuel pump not priming
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<blockquote data-quote="Donkey" data-source="post: 434058" data-attributes="member: 19938"><p>I guess the question is whether the engine will start with the pump jumper in. If it does you need to look into what tells the pump to start. If it doesn’t start the next look is the asd system. I also ran into a crank no start when the pcm wasn’t getting a crank signal from the ignition switch. Asd would power up but pcm would not pulse anything. The pcm ground signal should activate the pump if it’s conditions are met. I have not seen the ram pin out but in my case it was a yellow wire to starter solenoid that caused the issue.</p></blockquote><p></p>
[QUOTE="Donkey, post: 434058, member: 19938"] I guess the question is whether the engine will start with the pump jumper in. If it does you need to look into what tells the pump to start. If it doesn’t start the next look is the asd system. I also ran into a crank no start when the pcm wasn’t getting a crank signal from the ignition switch. Asd would power up but pcm would not pulse anything. The pcm ground signal should activate the pump if it’s conditions are met. I have not seen the ram pin out but in my case it was a yellow wire to starter solenoid that caused the issue. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Fuel pump not priming
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