Quote:
Originally Posted by Walter_
302blue Nicely done. I stand corrected. If you have a lean bank code the ECU is make a 25% change in fueling and the still get a lean indication. The airflow change with the CAI is on the order 3 or 4%. The GM CAI must do bad things to the MAF air flow. I bet they designed the intake and as soon as they tested it found they had a problem. As alway GM said "we can fix this with a cal change". Makes senses to now why they need the cal change to the MAF table.
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That's probably exactly what happened to be honest. Designed it and realized it messes with the MAF sensor readings, and it was cheaper to pay for a reprogramming compared to going back and redesigning it correctly.