Whats is a MAF?

mass air flow sensor.
http://www.autoshop101.com/forms/h34.pdf#search=%22mass%20airflow%20sensor%22

Leroy

Mass Air Flow sensor, measures the amount of air flowing into the engine which then tells the electronics how much fuel to supply for the optimum fuel/air mix.

Hi Leroy and Peter2

Thanks for your replies.

Like many things in life it is so obvious once you know

Regards
Phil

Mass Airflow sensor

It Detects how much Air is flowing thru the intake and gives the Info to the engines ECU.

You also get MAP sensors or Mass air pressure sensor> they have their advantages over the MAF as the MAF has its advantages over the MAP.

Don’t ask me to explain what the Advantages and disadvantages are as I am not full bottle on it, but on an application like a Gen 3 V8 swapping the MAF for a MAP and dyno tuning it will get you 30-40-RWKW just like that.

When I went to tech a map sensor was a manifold absolute pressure sensor not a manifold AIR sensor as suggested by 120cruiser

Golly gosh... and here's me thinking all this time that a MAP was a thing that woman can't read and men don't need!!!

Hi Everyone

Thanks for your replies.

The Gregory's Workshop Manual for the Nissan Patrol ZD30 engine show what I understand to be the MAF as the Air Flow Sensor in the connecting hose from the top cover of the air cleaner.

However, there are 3 other items that it may be;

1. Intake air control actuator on the throttle body,
2. Intake air control solenoid,
3. Swirl control solenoid.

Thanks for your assistance
regards
Phil

Question. How would the MAF (mass air flow) sensor react if you had a filthy air filter?

The reason I'm asking is because my Nissan Dealer (yes I own a ZD30) says to obtain the maximum reliability out of my engine I should ensure two basic things are right at all times.

1. Engine oil level is to maximum recommended capacity.
2. Air filter is cleaned regularly and not allowed to clog between services.

I have a K&N filter which I check (and service if required) after any dusty 4wd trip, especially one which may involve close convoy procedures.

The filter housing for the ZD30 is not large by any means and this was my main
motivation in fitting the K&N which I could service even on the road if necessary.
The dealer thought this a great idea (obvious) because he felt that too many owners weren't checking them in between services and you could imagine how dirty they would get driving in dust day in and day out .

I also have a snorkel which also helps.

It would be interesting to see whether owners of the ZD30 that have had trouble in the past with their engines could have been better served by paying closer attention to their air filters.

My ZD30 uses almost no oil between services but the air filter becomes, I think, dirty very quickly.

Is it the MAF's job to compensate fuel flow with a dirty filter?
Any thoughts?