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SVT Shelby GT500
fuel pressure confusing me !!
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<blockquote data-quote="69b302" data-source="post: 13456172" data-attributes="member: 52691"><p>The PCM is usually looking at the pressure drop across the injectors, and not absolute fuel pressure. The drop across the injector takes into account the intake manifold vacuum or pressure(boost). The vacuum line from the front of the intake manifold to the fuel rail pressure sensor is how the fuel pressure sensor links in the manifold pressure. A solid 40 from the PCM sounds ok, and an external guage would read 60 psi, if you had 20 psi of boost. 10.5 A/F ratio seems fat, but depends on how aggressive your setup is.</p></blockquote><p></p>
[QUOTE="69b302, post: 13456172, member: 52691"] The PCM is usually looking at the pressure drop across the injectors, and not absolute fuel pressure. The drop across the injector takes into account the intake manifold vacuum or pressure(boost). The vacuum line from the front of the intake manifold to the fuel rail pressure sensor is how the fuel pressure sensor links in the manifold pressure. A solid 40 from the PCM sounds ok, and an external guage would read 60 psi, if you had 20 psi of boost. 10.5 A/F ratio seems fat, but depends on how aggressive your setup is. [/QUOTE]
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SVT Shelby GT500
fuel pressure confusing me !!
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