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Old 07-27-2012, 04:46 PM   #9
blue2000s
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
If the housing is larger than the DME expects, it will think the airflow is lower than it is. The car will run lean. The DME knows it's lean by reading the O2 sensor. So it knows there's either a problem with the MAF or O2 sensor.

Others with the larger engine must have upgraded their DME or are using the 2.5 MAF housing.
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