1990 Spider Motronic / Air Flow meter

[Alfaclan@domain.elided]

Hi Group

Yesterday I was helping a non-digester diagnose his intermittent "check 
engine" light on his 1990 Spider Motronic with 95k miles.  After pulling up a 
1221 error code (air flow meter) on the auto diagnosis system following some 
very vigorous driving needed to cause the light to appear, we disconnected 
the AFM and checked the resistance per the factory manual.  Resistance 
between pins 3 and 4 of the AFM was 350 ohms versus suggested reading of 
"about 400" ohms.  Resistance between pins 2 and 4 was 42 ohms versus 
suggested results of "about100" ohms.  

Does the AFM need replacing?  If so, any suggested sources for the least 
cost?  The owner knows what IAP charges and he is not excited.  Any 
substitute AFMs for the Motronic Spider? (Please don't flame me Fred).  Any 
group wisdom on this problem?

Thanks in advance,

Jim Warren
Alfaclan@domain.elided
Macon, Georgia, USA
Many pre-computer Alfas

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