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Old 10-14-2014, 11:38 PM   #24 (permalink)
firehawk618
EcoModding Apprentice
 
Join Date: Oct 2014
Location: Marysville, wa
Posts: 221

97 Civic HX sedan VX trans - '98 Honda Civic LX + HX + VX
90 day: 41.9 mpg (US)
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Could it be a leaky fuel injector? When you hit DFCO your injectors are at zero duty cycle and you should almost immediately see your AFR's peg out full lean.
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