MAF sensor - expected values

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laliok

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I have a 96 Tahoe 5.7 Vortec 4WD.

I am trying to understand the ideal values for the MAF sensor.

I can see online that a warm engine idling should have a MAF reading around 6 g/sec, which my sensor outputs.

But, can't find a reference table on high RPMs.

BTW, what to compare with MAF sensor readings? Engine load, RPM, throttle position?

cXLHt.png

In this graph, I can see
A: At 25% throttle, 2000 RPM, 55% engine load --> MAF reads 50 g/sec
B: At 50% throttle, 3000 RPM, 65% engine load --> MAF reads 80 g/sec
C: Idling, 600 RPM, 20% engine load --> MAF reads 7 g/sec

How do these MAF values look to you?

Other question: are engine load 20% and engine speed 600 RPM OK when idling?
 

east302

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Not sure if this will help, but here are the specs for a 1998. Idle conditions appear within spec...are you getting any codes or having drivability issues?

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laliok

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Not sure if this will help, but here are the specs for a 1998. Idle conditions appear within spec...are you getting any codes or having drivability issues?

Thanks for the answer east302. Idling seems OK to me as well after doing some more research.

I just bought this vehicle a month ago and there are very very few Tahoes in the area I live. I can't find another Tahoe to compare data and drivability. So, I am just trying to compare the information I collect with the specs.
 

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