Td5 airflow meter

Two, one is the sense wire, the other is the reference wire.

Tim..

most air flow meters will have two wires one heated and another unheated the air flows over both of them and the cooling effect of the airflow(measured by the resistance i think) compared to the unheated wire is used to calculate the airflow

well thats how the >Can anyone tell me how many thin wires are inside the airflow meter,mine has

What effect would 1 missing have on the general running of the engine? many thx in advance Tim

The air DOESN'T flow over one of them, and the two coils are arranged in a Wheatstone bridge. I think.

Steve

In an internal combustion engine, for example, the intake air flow rate of the internal combustion engine is detected and used as a parameter for controlling the operation of the internal combustion engine. For detection of the intake air flow rate, a hot wire air flow meter, for example, is available wherein a hot wire heated to a predetermined temperature is placed in an intake air path, and a current flowing through the heated hot wire is measured to detect an air flow rate. This type of air flow meter is disclosed in, for example, U.S. Pat. No. 4,297,881 to Sasayama et al issued on Nov. 3, 1981. Since, in an air flow meter, the value of air flow rate to be detected changes with the temperature of intake air, it has hitherto been practice to compensate the detected output for intake air temperature. Generally, in a hot wire air flow meter, for example, a cold wire is provided in addition to the hot wire, which cold wire is placed in the same intake air path to effect the detection of the air temperature simultaneous with the compensation therefor. Generally, this type of temperature compensation is also employed in a variety of intake air flow meters of the other type

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Dunno about "most air flow meters" the ones used by landrover are more often the flapper type however the TD5 uses a hot film system ( similar to that described above) detailed on page 230

Which is what I said.

Steve

If its knackered or thereabouts then engine performace will be flat, especially as the turbo starts to spool with an reluctance to rev under load.

Tim..