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New 2013 roush raptor stalls
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<blockquote data-quote="MTF" data-source="post: 547948" data-attributes="member: 499"><p>You have to understand that when lift your foot off the gas pedal completely the fuel supply is turned off momentarily, this is true for stock or supercharged. </p><p>This is one of the fuel saving features built into the PCM.</p><p> </p><p>I bet you that when it stalled the few times there was a temperature change or humidity jump </p><p>and the PCM was in the beginning of a fuel trim cycle (every 50 miles) and the PCM just had not adapted yet to the conditions.</p><p> </p><p>This did happen once or twice to me two years ago with the first Tune Whipple had but I was running the 63lbs. injectors which are harder to control.</p><p> </p><p>Now you are saying that you can almost get the stall at any time.</p><p>I'd say Roush needs to fine tune their Tune.</p><p> </p><p>Let me ask you, what are the short fuel trims readings doing? Are both banks pretty even? Are they jumping around a lot at idle?</p><p>If that's the case then you have a small air leak somewhere.</p></blockquote><p></p>
[QUOTE="MTF, post: 547948, member: 499"] You have to understand that when lift your foot off the gas pedal completely the fuel supply is turned off momentarily, this is true for stock or supercharged. This is one of the fuel saving features built into the PCM. I bet you that when it stalled the few times there was a temperature change or humidity jump and the PCM was in the beginning of a fuel trim cycle (every 50 miles) and the PCM just had not adapted yet to the conditions. This did happen once or twice to me two years ago with the first Tune Whipple had but I was running the 63lbs. injectors which are harder to control. Now you are saying that you can almost get the stall at any time. I'd say Roush needs to fine tune their Tune. Let me ask you, what are the short fuel trims readings doing? Are both banks pretty even? Are they jumping around a lot at idle? If that's the case then you have a small air leak somewhere. [/QUOTE]
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New 2013 roush raptor stalls
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