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Problem with MAF

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Old Apr 12, 2010 | 07:44 PM
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Default Problem with MAF
I am trying to get my truck tuned, and Justin with blackbear said my MAF is reading 20% off. I just did a swap from a 99 4.3 to 02 4.8, and still running the original MAF. Could running the 4.3 MAF throw this off or would it be more likely that it is going bad? Thanks for any help
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Old Apr 12, 2010 | 07:48 PM
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pretty sure there the same. I would guess bad maf
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Old Apr 12, 2010 | 08:22 PM
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Yea im gonna try MAF cleaner, then if that doesnt help i guess its a new one
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Old Apr 12, 2010 | 10:40 PM
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I believe the 4.3 maf is calibrated differently
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Old Apr 13, 2010 | 12:26 AM
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Oh well that might be it then, If the cleaner didnt fix it, im going to grab another one off a 2000 5.3 to see if that does anything.
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Old Apr 13, 2010 | 06:57 PM
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Originally Posted by 1FastBrick
I believe the 4.3 maf is calibrated differently
like in the sensor itself?
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Old Apr 13, 2010 | 07:03 PM
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The sensors are the same. The trims justin was looking at for the MAF were probably 20% off which seems reasonable for the bigger engine.
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Old Apr 14, 2010 | 12:59 AM
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Originally Posted by Atomic
The sensors are the same. The trims justin was looking at for the MAF were probably 20% off which seems reasonable for the bigger engine.
Agreed. Justin will just calibrate your MAF table so the correct fueling will be had. Your MAF is most likely fine.
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