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2011-2014 Mustangs
2011-2014 Mustang Talk
Ping @ 3500 When Cold (stock)
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<blockquote data-quote="CCS86" data-source="post: 12288465" data-attributes="member: 140595"><p>Now that the weather is cooling off, something new has developed with my car. On cool mornings (< ~65*), before the car is fully warmed up, it will ping under heavy part throttle; always between 3400-3600 rpm. Just a quick clatter as it passes through that range. Running 93 octane from Shell.When fully hot, it clears up.</p><p></p><p>On the data log:</p><p></p><p>Coolant temp: 122</p><p>Spark Advance: 25</p><p>Commanded AFR: 14.8:1</p><p>Measured AFR: 15.3:1</p><p></p><p>It's running a little lean there, as my car tend to do. Most of the long term fuel trims are positive. But 15.3:1 is not excessively lean to knock at half throttle.</p><p></p><p>Thoughts?</p></blockquote><p></p>
[QUOTE="CCS86, post: 12288465, member: 140595"] Now that the weather is cooling off, something new has developed with my car. On cool mornings (< ~65*), before the car is fully warmed up, it will ping under heavy part throttle; always between 3400-3600 rpm. Just a quick clatter as it passes through that range. Running 93 octane from Shell.When fully hot, it clears up. On the data log: Coolant temp: 122 Spark Advance: 25 Commanded AFR: 14.8:1 Measured AFR: 15.3:1 It's running a little lean there, as my car tend to do. Most of the long term fuel trims are positive. But 15.3:1 is not excessively lean to knock at half throttle. Thoughts? [/QUOTE]
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2011-2014 Mustang Talk
Ping @ 3500 When Cold (stock)
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