False flow readings from flow sensor.

[hotshot25120]

I have to to move the assembly and now its wrost here a picture of the new setup :



I have try to unclip the sensor and no false reading when the sensor is unclip.

[Richard L]

That is great, we eliminated one thing for now.

It that case, rotate the sensor to three o'clock and see if the ghost reading goes away.

[hotshot25120]

I have done a quick test at idle and

12 oclock = false reading
3 oclock = no false reading so far
9 oclock = false reading

[Richard L]

I believe the turbine is fluttering between the poles at certain angle and create false pulses.

How far is the jet from the FAV?

[hotshot25120]

1 foot from the first jet (after Throttle body (check valve))
3 foot from the lower jet (after intercooler)

[Richard L]

Is this problem happened recently?

[dave80]

your fav still is right on the engine mount. It will cause false readings, see pic below for what has worked for me.

[hotshot25120]

after some day of testing with the sensor in the 3 oclock position I still have false reading sometime but its way better than before.

I will try to move the assembly close to the windshield washer tank but before I need to reorder some small tubing because It will be too short.

Thanks

[Richard L]

The rocking of the turbine wheel in the sensor is the most likely cause of the false readings.

The turbine wheel is magnetised. Polarity flip when rotates. Producing electrical pulses from the Hall Sensor Chip inside the "C-clip."

Depending on the orientation of the turbine wheel relative to the Hall sensor, a slight movement will produce a pulse. If the position is very closed to the flipping of the magnetic poles. Slight vibration will produce false readings.

By rotating the c-clip diametrically, you can avoid false readings. Or place the FAV away from vibration.

[hotshot25120]

bad news after reordering some tubing and relocate the flow sensor exactly where Dave80 sensor is and I still have a lot of false reading.