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Ok so I've had some codes for a while (maf low input ,evap purge ,and o2 bank 1 ) so I logged it today and purge sempt to be responding appropriately along with everything else except the maf wouldn't budge it stuck at 0.47 lb/m and doesn't fluctuate at all .. And I remember logging with a friend one time and he had a bad maf and it just read all over the place .. Could I just have a bad maf ? Y would that set off the other codes as well? Any help trouble shooting this would be great ..(mods in signature )
 

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MAF value should fluctuate and change with rpm.
 
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