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Fast EFI tuning
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<blockquote data-quote="Timjus" data-source="post: 613533" data-attributes="member: 10953"><p>my holley hp efi learns just fine in idle.</p><p></p><p>most self learning systems needs to get to set operating temp before it starts learning. </p><p>holley has coolant temperature enrichment table it needs to be at 100% before learn can start. </p><p>you can pull battery cables out and all the tuning info stays in the box.</p><p></p><p>engines with open headers and very big cams makes O2 sensor read false in the idle. open headers pull external air in to o2 sensor and makes it read lean and ecu ads fuel to correct it. big cams with huge overlap makes idle tuning hard too.</p><p></p><p>for open headers just put some extension into o2 sensor side header and get the baseline tune and then take out the closed loop correction/learning from idle rpms and fine tune.</p><p>with big cams just tune manually and limit cl/learn from idle</p></blockquote><p></p>
[QUOTE="Timjus, post: 613533, member: 10953"] my holley hp efi learns just fine in idle. most self learning systems needs to get to set operating temp before it starts learning. holley has coolant temperature enrichment table it needs to be at 100% before learn can start. you can pull battery cables out and all the tuning info stays in the box. engines with open headers and very big cams makes O2 sensor read false in the idle. open headers pull external air in to o2 sensor and makes it read lean and ecu ads fuel to correct it. big cams with huge overlap makes idle tuning hard too. for open headers just put some extension into o2 sensor side header and get the baseline tune and then take out the closed loop correction/learning from idle rpms and fine tune. with big cams just tune manually and limit cl/learn from idle [/QUOTE]
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