IML: Monitoring Control Fuel pump voltage (81-83 EFI cars)

["Dick Benjamin" <dickb@xxxxxxxxx>]

Good point, I should have noticed that.  

Yes, the voltage sounds about right for idle.   The pump gets reluctant to
start when it accumulates gelled gas inside, according to Bob Baker; that
would no doubt affect the idle voltage, but 2 1/2 sounds about right to me.
Since this point is within the feedback loop, it probably isn't critical.

Dick Benjamin

-----Original Message-----
From: Ken W Stephenson [mailto:kss37215@xxxxxxxx] 
Sent: Wednesday, July 27, 2005 1:07 PM
To: dickb@xxxxxxxxx
Subject: (81-83 EFI cars)

Doing
some testing, I noticed that the feedback lead from the Power Module is
the same as the pump drive, so I monitored it with the VOM.  It reads
about 2 1/2 to 3 volts idling.   Is that normal?  In one of the web pages
either you or Bob mention snaking a wire out through the air snorkel to
monitor the pump voltage.  It's easier to pin prick the light green wire
on pin 4 of the ASDM.  Monday morning quarterbacking sure is easy. 
Anyway, this buggy seems to like moderate climates, but why?
Regards, Ken
          


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