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Old 10-01-2012, 09:03 PM   #2 (permalink)
RobertISaar
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Join Date: Jul 2012
Location: camden, MI
Posts: 324

MC SBX - '95 Chevrolet Monte Carlo LS
Last 3: 29.75 mpg (US)
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could be the car....

a lot of manufacturers impliment delays when it going into power enrichment mode, some are time based, others RPM, other airflow, others based on how quickly the throttle is opening, others are a combination of all of them.

try coasting at 3500RPM in some gear, then lean into it and see if the AFR changes almost instantly compared to starting at a lower RPM.
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