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SVT Shelby GT500
Need help - rough running
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<blockquote data-quote="SCGallo2" data-source="post: 16217883" data-attributes="member: 160791"><p>Sounds like cold start open loop fueling is fine, then once your engine warms up and PCM switches to closed loop fueling you start to have issues. Are you running leaded race fuel that can foul your narrowband O2 sensors in both banks? Your A/F ratio doesn't make sense... I didn't think AeroForce Interceptor could read lower than 10.0 (0V=10.0, 5V=19.99).</p><p></p><p>I would try datalogging short and long term fuel trims with a SCT X3/X4 to verify what you are seeing on your Interceptor gauges. You could also log AFR if you know how to connect your wideband to your device.</p></blockquote><p></p>
[QUOTE="SCGallo2, post: 16217883, member: 160791"] Sounds like cold start open loop fueling is fine, then once your engine warms up and PCM switches to closed loop fueling you start to have issues. Are you running leaded race fuel that can foul your narrowband O2 sensors in both banks? Your A/F ratio doesn't make sense... I didn't think AeroForce Interceptor could read lower than 10.0 (0V=10.0, 5V=19.99). I would try datalogging short and long term fuel trims with a SCT X3/X4 to verify what you are seeing on your Interceptor gauges. You could also log AFR if you know how to connect your wideband to your device. [/QUOTE]
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Need help - rough running
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