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The Terminator
Engine/Tuning
Help with P0193 after fuel pump install
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<blockquote data-quote="Roush6018" data-source="post: 16815015" data-attributes="member: 78571"><p>fuel pressure circuit A too high is your code. the pcm needs to see that sensor to determine the fuel pressure. you should be able to test the output voltage of the sensor at the connector on the fuel rail, compare that reading to the same wire at the connector for the pcm, for the fuel pressure circuit A. if there is a voltage reading at the sensor and you can not get the same reading at the PCM, there is a problem with the wire making the trip through the wiring harness. </p><p></p><p>i did have a problem with my stock (cheap) alternator causing my fuel pressure to drop on a dyno pull with no check engine lights . now i run a J2 alternator from lethal perf. </p><p></p><p>i think your fuel pressure should be 50-55 psi at idle warm engine. and during a pull it will drop but not much maybe 5-10 psi loss.</p></blockquote><p></p>
[QUOTE="Roush6018, post: 16815015, member: 78571"] fuel pressure circuit A too high is your code. the pcm needs to see that sensor to determine the fuel pressure. you should be able to test the output voltage of the sensor at the connector on the fuel rail, compare that reading to the same wire at the connector for the pcm, for the fuel pressure circuit A. if there is a voltage reading at the sensor and you can not get the same reading at the PCM, there is a problem with the wire making the trip through the wiring harness. i did have a problem with my stock (cheap) alternator causing my fuel pressure to drop on a dyno pull with no check engine lights . now i run a J2 alternator from lethal perf. i think your fuel pressure should be 50-55 psi at idle warm engine. and during a pull it will drop but not much maybe 5-10 psi loss. [/QUOTE]
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Help with P0193 after fuel pump install
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