Checking MAF using Torque

brianw · 12th October 2015, 21:43

Not knowing how long my MAF sensor had been on my CDT when I got it four years ago and having put almost another 70K on it since then I thought it was time I checked my MAF.
The car has been driving fine and fuel consumption has remained pretty constant so I had no real worries but it is nice to get some confirmation.

From reading on this forum I understand that MGR specified two points at which to check the MAF signal namely:

780 RPM

3000 RPM

The readings they look for there are quoted in milligrammes per stroke
while in Torque the MAF readings are given in Grammes per second.
Obviously the figures from Torque need to be converted to make any sense of them.

I checked mine out yesterday and all was good with the conversion scribbled on a scrap of paper.
Doing the conversion made my brain hurt

so this evening with scrap of paper still available I wrote a small application to save me the

in the future.

If anyone else would like to try it they are welcome.

Also if anyone sees any anomolies or mistakes in the figures I am using if you let me know I will make correction/s.

Below are a couple of screenshots:
And a zip file containing the application.

daznkel · 13th October 2015, 11:49

Not used it yet but what a great idea. Thanks.!

Just a quick question. What temperature do the readings need to be taken at? I.e Coolant at 80 deg C?

brianw · 13th October 2015, 11:58

Engine at operating temperature.
The most difficult part is holding the revs at a steady 3000rpm.
It could be thought a bit antisocial so I wouldn't try in the small wee hours.

daznkel · 13th October 2015, 12:52

Thanks. I will give it a go when I get home and post results.

I did plot MAF v Engine rpm HERE a while back and all looked ok

13th October 2015, 11:49	#2
daznkel Posted a thing or two 04 MG ZT+ 190 XPG & 99 (T) Dealer Launch 75 V6 Connie Auto Join Date: Oct 2012 Location: Plymouth Posts: 1,080 Thanks: 615 Thanked 456 Times in 309 Posts	Not used it yet but what a great idea. Thanks.! Just a quick question. What temperature do the readings need to be taken at? I.e Coolant at 80 deg C? __________________ Click HERE To Be Added To The South West Members Location Map Upgrades/Mods so far: Custom Angel Eye DRL's, MG7 Rear lights, Custom Door Cards, MGR Plates, Red Alcantara Seats, Black Oak Dash, Powerflex bushes, Plenum Spy Mod, Rear Light Seals, 5000K HID Kit, Navall 3 DD, Blue LED Conversion, Custom badges, Union badges, Flip key. Working on more! [SIGPIC][/SIGPIC]

13th October 2015, 12:52	#4
daznkel Posted a thing or two 04 MG ZT+ 190 XPG & 99 (T) Dealer Launch 75 V6 Connie Auto Join Date: Oct 2012 Location: Plymouth Posts: 1,080 Thanks: 615 Thanked 456 Times in 309 Posts	Thanks. I will give it a go when I get home and post results. I did plot MAF v Engine rpm HERE a while back and all looked ok __________________ Click HERE To Be Added To The South West Members Location Map Upgrades/Mods so far: Custom Angel Eye DRL's, MG7 Rear lights, Custom Door Cards, MGR Plates, Red Alcantara Seats, Black Oak Dash, Powerflex bushes, Plenum Spy Mod, Rear Light Seals, 5000K HID Kit, Navall 3 DD, Blue LED Conversion, Custom badges, Union badges, Flip key. Working on more! [SIGPIC][/SIGPIC] Last edited by daznkel; 13th October 2015 at 12:57..

13th October 2015, 11:58	#3
brianw Gets stuck in Rover 75 CDT Connoisseur SE Rover 75 1.8 Auto Connie Join Date: Nov 2011 Location: Aldershot Posts: 927 Thanks: 126 Thanked 119 Times in 79 Posts	Engine at operating temperature. The most difficult part is holding the revs at a steady 3000rpm. It could be thought a bit antisocial so I wouldn't try in the small wee hours.