MAF readings (g/s) - help
#11
Thank you guys for the values. Keep it up!
under live values it is
engine petrol
-mass air flow (g/s)
UPDATE:
Okay so cleaned the MAF anyway. I think I see where that 16 g/s might be coming from. After starting my rpm is around 1500, before dropping maybe a half-minute to a minute later down to ~700rpm or so. I think the D3.uk IID tool faq thinks 1500rpm idle at startup is the norm.
At 1500rpm I was getting (post cleaning) 15-17 g/s
At 700 (low-idle, also post cleaning) I was getting 6.9 g/s
Intake air temp (same as outside air temp) was 68F.
Patrick got back to me saying he would check on what he has for a NAS D3 MY06.
under live values it is
engine petrol
-mass air flow (g/s)
UPDATE:
Okay so cleaned the MAF anyway. I think I see where that 16 g/s might be coming from. After starting my rpm is around 1500, before dropping maybe a half-minute to a minute later down to ~700rpm or so. I think the D3.uk IID tool faq thinks 1500rpm idle at startup is the norm.
At 1500rpm I was getting (post cleaning) 15-17 g/s
At 700 (low-idle, also post cleaning) I was getting 6.9 g/s
Intake air temp (same as outside air temp) was 68F.
Patrick got back to me saying he would check on what he has for a NAS D3 MY06.
#12
#13
Also... WOW, a 50% increase in MAF reading just by cleaning it?
#14
My units are set for psi but I am wondering if it is still outputting the number as kpa even though it is labeled psi on my display.
My initial tests did not include looking at numbers while rpm was 1500. I only looked at the normal idle ~700-800rpm. So all I was seeing was 4.6-4.7 g/s
Yeah I was a bit surprised. MAF was a little blacked at the air burner (forget what the technical term is) and cleaned up okay. Ran the numbers twice, two different starts and it seemed pretty responsive to throttle input so I think it is reading normally. No codes. To be fair I think I have done 20k since my last cleaning...
My initial tests did not include looking at numbers while rpm was 1500. I only looked at the normal idle ~700-800rpm. So all I was seeing was 4.6-4.7 g/s
Yeah I was a bit surprised. MAF was a little blacked at the air burner (forget what the technical term is) and cleaned up okay. Ran the numbers twice, two different starts and it seemed pretty responsive to throttle input so I think it is reading normally. No codes. To be fair I think I have done 20k since my last cleaning...
#15
Patrick was kind enough to log his commute home. I think the D3.uk listing for the standard air flow is wrong, or assumes 1500rpm at idle.
attached below (I took out his VIN) This is for an 06 LR3. Assume temps are in C, pressure in kpa.
My numbers look okay when compared to his. My MAF was a little dirty (clean now), but this makes me feel way better. Hope you all get a good reference from this. Also it should be said we in California are getting temps of 18C, while I see he logged intake temps below freezing... so I expect his airflow (because of air density?) to be a little above mine.
attached below (I took out his VIN) This is for an 06 LR3. Assume temps are in C, pressure in kpa.
My numbers look okay when compared to his. My MAF was a little dirty (clean now), but this makes me feel way better. Hope you all get a good reference from this. Also it should be said we in California are getting temps of 18C, while I see he logged intake temps below freezing... so I expect his airflow (because of air density?) to be a little above mine.
Last edited by DavC; 02-09-2016 at 05:36 PM.
#16
Update again:
I gave my better numbers to patrick with a few other data points. He said it seems within a reasonable range. If it was bad, the engine ECU would have logged a fault, which it hadn't. I'll post a log of my commute home if I remember to hook it up before I leave work today.
I did change the barometric pressure units to kpa, and it displayed correctly (101kpa)
I gave my better numbers to patrick with a few other data points. He said it seems within a reasonable range. If it was bad, the engine ECU would have logged a fault, which it hadn't. I'll post a log of my commute home if I remember to hook it up before I leave work today.
I did change the barometric pressure units to kpa, and it displayed correctly (101kpa)
#17
Last update:
I'll post my data so hopefully someone will get some benefit from these numbers later. Truck is running fine.
It is a lot of data, 2 hours worth of driving on highway and surface streets. FYI if anyone was wondering about air flow with a snorkel like I was, all of this was with a snorkel installed. No issues.
I'll post my data so hopefully someone will get some benefit from these numbers later. Truck is running fine.
It is a lot of data, 2 hours worth of driving on highway and surface streets. FYI if anyone was wondering about air flow with a snorkel like I was, all of this was with a snorkel installed. No issues.
Last edited by DavC; 02-17-2016 at 08:47 PM.
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