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MAF readings (g/s) - help

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Old Feb 8, 2016 | 04:39 PM
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Default MAF readings (g/s) - help

Anyone with a 3 and an IID tool, can you do me a favor?

I have been running some numbers recently both before and after fitting a safari snorkel (the original idea was to check airflow), and my MAF readings come back between 4.5-4.7 g/s at idle (~800rpm?). Side note: air flow seems to be unchanged .

If convenient, can you guys throw up some live value numbers for me? I typically test after a drive >30min, sitting at idle right before I kill the engine and go inside the house.

Example:
(64F temps outside)
MAF: 4.7 g/s
Intake temp: 64.4F
Engine oil temp: 169.2F
Engine coolant temp: 194.0

D3.uk in their IID tool faq mentions the idle reading:

"Mass air flow g/s - Typical value at idle of 16g/s" (IIDTool Live Values - DISCO3.CO.UK Knowledge Base)

Just wondering if MAF needs a clean or worse.
 

Last edited by DavC; Feb 8, 2016 at 04:44 PM.
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Old Feb 8, 2016 | 05:20 PM
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You should e-mail the folks at GAP. They will have those numbers for sure.
 
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Old Feb 8, 2016 | 05:21 PM
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That. Is a good idea.
 
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Old Feb 8, 2016 | 05:24 PM
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Cheers...and please post their response. That way all of us that have an IIDTool can check the MAF readings periodically and have a clue as to when it may need service.
 
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Old Feb 8, 2016 | 05:32 PM
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Yes will do. The few reference values people have collected I would love to see compiled in a PDF at some point. I would laminate that bad boy and carry it everywhere.
 
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Old Feb 8, 2016 | 06:00 PM
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MAF readings (g/s) - help-image-4045414332.jpg

This was mine earlier today but I have some DTC p0171 and p0174. I'm interested in what you find out.
 
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Old Feb 9, 2016 | 11:45 AM
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Can any IIDTool do this? Or is this exclusive to the BT version?
 
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Old Feb 9, 2016 | 12:21 PM
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AFAIK any one can do this, but the BT version outputs the display for that data to a phone/tablet. There should be a section in the main menu tree labeled live values.
 
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Old Feb 9, 2016 | 02:49 PM
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Sorry, didn't pay attention to coolant temp, but ambient air temp is 35F here and my MAF reading was 5.8 g/s at idle (after a 30 min drive).
 
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Old Feb 9, 2016 | 02:57 PM
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Under Live values, what selection is it? Does it say "MAF?"
 
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