Ta and good move PTS though I would gave titled it "Hotwire" not "D1" ...as hate to get them Classic boys in a lather. Will close out this channel with the Group Buy link. Cheers

While the “CO trim pot” not connected to the MAF's airflow electronics it is still part of the MAF body unfortunately. I recommend you go to LovemyRangie's Tutorial mentioned above to test if that potentiometer or pot is functioning.

If not then you have 2 options, replace the MAF or a cheaper option of splicing into the MAF loom end a 1000 Ohm potentiometer between wires at MAF connector 2 (wire not cut) and 6 (wire cut)or at the ECU loom end between pins 25 (wire not cut) and 22 (cut). Don’t forget to tell your mechanic!!

I note the replacement for this fixed CO trim pot function being oxygen/O2/Lambda/catalyst sensors was not supplied to the factory fuel injection systems in Australia that use these MAF’s (except there is a catalyst fuel map sitting in the ECU chip).

MAF Group Buy thread is now up at

http://www.aulro.com/afvb/technical-...group-buy.html

Peel back MAF boot connector. You will find on underneath that each connector is numbered. To check the airflow signal backprobe ground connector 2 (red with black trace or just black) and airflow signal connector 4 (blue with green trace or just green). Switch on ignition (but not starter) and expect to see 0.30 - 0.35 volts. Switch off wait 10 seconds and then switch ignition on again. Airflow signal should immediately go to 0.30 – 0.35 volts.



Witch Maf is being tested here i am a little confused
If its a 5AM they dont have a wire for pin 4

Test Correction.

+ "Airflow signal" connector is MAF connector #3 on both 3AM and 5AM MAF's. Don't understand why I said MAF Connector #4 (which is blank)????

Gets a bit confusing with MAF ground - connectors using both #1 and #2 or only one of them depending on MAF and MAF wiring harness vintage.

Rest assured though the MAF which is the subject of the "group buy" is backwards compatible with all harness vintages.

Sounds as though I should post a testing tutorial inc pictures.

Thanks heaps