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New Edge Cobras
2001 SVT Cobra Low Fuel Pressure 28lbs
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<blockquote data-quote="procharged420" data-source="post: 15074272" data-attributes="member: 175698"><p>Hey sorry to hear about your issues. My first question is how did your mechanic measure the fuel pressure? </p><p></p><p>At idle, target fuel pressure is around 40psi differential (i.e. measured with a scan tool). However, if you measure using a fuel pressure gauge on the schrader valve you will measure around 30psi assuming that the car is making around 20" Hg manifold vacuum at idle (20" Hg at 60F ~ 9.8psi).</p><p></p><p>If he used a schrader valve your pressure isn't far off and I would check your FRPS or MAF first. </p><p></p><p>Also for kicks check that fuel filter out to be safe. If your not shuddering in 1st and 2nd I wouldn't jump to the fuel pump right away...</p></blockquote><p></p>
[QUOTE="procharged420, post: 15074272, member: 175698"] Hey sorry to hear about your issues. My first question is how did your mechanic measure the fuel pressure? At idle, target fuel pressure is around 40psi differential (i.e. measured with a scan tool). However, if you measure using a fuel pressure gauge on the schrader valve you will measure around 30psi assuming that the car is making around 20" Hg manifold vacuum at idle (20" Hg at 60F ~ 9.8psi). If he used a schrader valve your pressure isn't far off and I would check your FRPS or MAF first. Also for kicks check that fuel filter out to be safe. If your not shuddering in 1st and 2nd I wouldn't jump to the fuel pump right away... [/QUOTE]
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2001 SVT Cobra Low Fuel Pressure 28lbs
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