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Discussion Starter · #1 ·
hi all,<br itxtNodeId="40">can anyone tell me what maf readings i should be
getting on my 2.9 crdi.at idle i'm getting 18 g/s. is this normal.
i think my maf readings are a little
high and would like to compare.<br itxtNodeId="38">thanks
 

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Discussion Starter · #2 ·
raptorman said:
hi all,<br itxtNodeId="40">can anyone tell me what maf readings i should be
getting on my 2.9 crdi.at idle i'm getting 18 g/s, 2000rpm 30g/s and 3000rpm 63g/s.
are these within normal range.
thanks
 

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I had a look on the w/s manual and it does not give readings the way you are describing.
This is how it looks and I think you need an osciliscope to view readings or the proper diagnostic equipment.
Here goes. These figs are at 20c air temp.

AIR FLOW (kg/h) Frequency (KHZ)

8 1.94 - 1.96
10 1.98 - 1.99
15 2.06 - 2.07
75 2.72 - 2.75
160 3.36 - 3.41
310 4.44 - 4.53
640 7.66 - 8.01
800 10.13 - 11.17

Just to add on some MAFs you can clean the sensor with Isopropyl alchohol or some peeps use carb cleaner. I cleaned the MAF on my LT35 with carb cleaner and it made a difference to performance. Not a lot mind you but it was noticeable.




Edited by: davy
 

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Discussion Starter · #5 ·
davy said:
I had a look on the w/s manual and it does not give readings the way you are describing.
This is how it looks and I think you need an osciliscope to view readings or the proper diagnostic equipment.
Here goes. These figs are at 20c air temp.

AIR FLOW (kg/h) Frequency (KHZ)

8 1.94 - 1.96
10 1.98 - 1.99
15 2.06 - 2.07
75 2.72 - 2.75
160 3.36 - 3.41
310 4.44 - 4.53
640 7.66 - 8.01
800 10.13 - 11.17

Just to add on some MAFs you can clean the sensor with Isopropyl alchohol or some peeps use carb cleaner. I cleaned the MAF on my LT35 with carb cleaner and it made a difference to performance. Not a lot mind you but it was noticeable.
Thanks for your reply.
Will try to make use of readings of i can.
My scanner reads in g/s (grams per second)
Maybe i can find a conversion chart.
 

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Here yeh go

KG/H GM/SEC

8 2.22
10 2.77
15 4.16
75 20.83
160 44.44
310 86.11
640 177.77
800 222.22

Hello,

just trying to make sense of this.

My car is reading 22g/s at idle. It is a turbo 2 litre engine. Scanned another car same model but a petrol and read 3 g/s at idle.

No error codes just trying to work out if this is correct.

Adam
 
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