Airflow Meters

[IanB]

Hi all

Im woundering what could be causing my AF-2 on my PFC to read at only 0.03 volts?

We took the intake system appart to install an ID3 and on putting it back together it no longer works. Yes we checked it was plugged in. And we also pulled another GTR 32 AFM off another car and plugged that in, no difference.

Car wont rev, obviously and is running hugely rich.

What could be causing it?

[RB30-POWER]

your going to need to apply power to the afm off the vehicle and measure the output voltage on the signal terminal and check if thats working. (will find pinout on these forums somewhere) if its works then the problem is the ecu or wiring to the airflow meter plug.

[RipNGrip]

"copied from the tread"

Yeah its not to difficult.

All you need is a 12 volt power supply, a fan and a multimetter.

Hook the power supply positive to pin 5 and the negative to pin 3.

Now hook the multimeter positive lead to pin 2 and the ground lead to pin 4.

You should once power is put the the afm see a voltage of around 0.5volts with no air flow.

Now turn on the fan and see if the voltage increases to around 2.5 volts.

This could be more or less depending on how much air the fan will blow.

A variable speed fan is best as it allows you to test the afm at different levels of air flow (more air more voltage).

The pin out of the afm is the same as the RB20 unit so if you get confused have a look at http://rb20det.com/air_flow_meter_pinout.html

Hope this helps champ