Alfa 33 Airflow Meter

[Guy Smiley]

Hi all,

I have 2 33's which have both have been diagnosed as needing new air flow meters.
One is a 1990 16 Valve and the other is a 92 Permanent 4.
Not sure if they are the same device across the models??
Any ideas? One of my mates has a contact who can rebuild afm's. Not sure how much this will cost yet so exploring options.


Regards
Hamish

[festy]

I have 2 33's which have both have been diagnosed as needing new air flow meters.

What's actually wrong with them? Worn out contact tracks?

[Martinsifredi]

Air flow meters are not to be played or tampered with , if you want top performance get a professional to service and re-calibrate it .  I will find out the details and post . may be  a few days .

[festy]

The VAF style AFMs used on the 33s are pretty simple devices.
The usual problems with these are caused by mechanical wear, nothing that a spray cleaner would fix.
I can repair these if you can't find somewhere local.

[festy]

There's a few writeups on the net already, just google "bosch afm repair".
The usual problem is that the wiper arm has worn through the resistor track, so a slight re-shaping of the wiper arm moves it's contacts onto fresh parts of the track.