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SVT Shelby GT500
Rough idle -getting worse over time
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<blockquote data-quote="XP900" data-source="post: 16930149" data-attributes="member: 199546"><p>Vinnie...couple of questions....</p><p>How long should the fuel system stay pressurized once the car is turned off? After it sat about 5 hours I pulled the fuel sensor out of the fuel rail and there was no fuel squirting out. When it went bad a I replaced it a few months ago I had fuel squirt out when it was removed....although I don't recall how long the engine sat off. Stock pumps with Lethal dual BAP. When idling I was getting a fairly constant reading of about 43 lbs (+-1) on the rail.</p><p></p><p>My 2010 has the original alternator..63K. Battery is a few years old (Duracell) and it measured 12.9 volts and load tester showed 800cca.. When the car was idling the Luanch showed the alt putting out between 13.8 and jumping around hitting 12.9 too...never saw a 14+ but if the battery is fully charged I'm not sure if that wouldn't be normal for the regulator. O2 sensors in front both moved around within the same range of values...back ones also both jumping around but within a much lower fange value. Trying to find specs on what they should be reading. Ordered tools...waiting on them.</p></blockquote><p></p>
[QUOTE="XP900, post: 16930149, member: 199546"] Vinnie...couple of questions.... How long should the fuel system stay pressurized once the car is turned off? After it sat about 5 hours I pulled the fuel sensor out of the fuel rail and there was no fuel squirting out. When it went bad a I replaced it a few months ago I had fuel squirt out when it was removed....although I don't recall how long the engine sat off. Stock pumps with Lethal dual BAP. When idling I was getting a fairly constant reading of about 43 lbs (+-1) on the rail. My 2010 has the original alternator..63K. Battery is a few years old (Duracell) and it measured 12.9 volts and load tester showed 800cca.. When the car was idling the Luanch showed the alt putting out between 13.8 and jumping around hitting 12.9 too...never saw a 14+ but if the battery is fully charged I'm not sure if that wouldn't be normal for the regulator. O2 sensors in front both moved around within the same range of values...back ones also both jumping around but within a much lower fange value. Trying to find specs on what they should be reading. Ordered tools...waiting on them. [/QUOTE]
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Rough idle -getting worse over time
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