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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
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<blockquote data-quote="Squatting Dog" data-source="post: 405515" data-attributes="member: 1688"><p>Loss of power after start up with failing canister purge valve, the computer is in open loop until certain criteria is met. With valve not fully closing/opening it is allowing more unmetered air to enter the system. </p><p></p><p>After the sensors are heated up, the Raptor goes into closed loop and the O2 sensors make their corrections.</p><p></p><p>The computer will go back into open loop under a variety of conditions. Throttle Position (TP) is one way.</p><p></p><p>There are parameters in the computer that determine what the TP is for Open Loop, and other things.</p><p></p><p>When that TP is reached, and the Raptor goes open loop, and richens up.</p><p></p><p>-Greg (aka squatting dog)</p></blockquote><p></p>
[QUOTE="Squatting Dog, post: 405515, member: 1688"] Loss of power after start up with failing canister purge valve, the computer is in open loop until certain criteria is met. With valve not fully closing/opening it is allowing more unmetered air to enter the system. After the sensors are heated up, the Raptor goes into closed loop and the O2 sensors make their corrections. The computer will go back into open loop under a variety of conditions. Throttle Position (TP) is one way. There are parameters in the computer that determine what the TP is for Open Loop, and other things. When that TP is reached, and the Raptor goes open loop, and richens up. -Greg (aka squatting dog) [/QUOTE]
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Ford Raptor Engine Discussion and Performance Mods
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