I had a customer that is kinda typical to what I normally run into call me
last week to say thanks.  He had been having a problem with his '84 Vanagon
running terrible and had been buying all of the parts from another list
vendor to try to solve the problem.  He replaced Oxygen sensor, AFM, temp
sender, coil, etc. with no luck.  After throwing all these parts at the
problem he calls me (I only wish they would call me first :).  Since
everything else seemed to be good he suspected the ECU.  I rented him a known
good one that I had for checking purposes, and he installed it and found it
was not the problem.  I told him to check all of the readings at the ECU plug
with a multimeter.  Immediately he found his problem.  The rebuilt AFM that
he had just purchased was out of limits.  The vendor was nice enough to send
him another unit and he checked it before installing it.  It was reading
properly and after he installed it, his problems were solved.

The point here is, don't take it for granted that a rebuilt, or new part is
good.  Always check it to make sure that it is within limits because it could
be defective.  And please call me first so I can save you $400 or $500 worth
of throwing money at a problem :)

Thanks,
Ken Wilford
http://www.vanagain.com
John 3:16
Office (856)-765-1583
Shop (856)-327-0027
Fax   (856)-327-2242