Search for Gremlins


Subject:    Search for Gremlins
From:    bakerocb@cox.net
Date:    Sun Aug 17 - 8:49 PM
8/17/2008

To reply to the author, write to "F. Tim Yoder" <ftyoder@yoderbuilt.com>

Report on this weekends search for Gremlins;

I spent  several hours under the panel checking all the ground buss
connections, breaker and switch grounds. I loosened the connections to the
amp, volt, oil temp and oil pressure gauges, wiggled the terminals and re
tightened. I did the same thing to the alternator and removed the regulator
spades and replaced them.I removed the radio, cleaned the connectors and re
installed it. I checked the ground straps from the engine to the motor
mount. I spent some time looking for something,anything wrong.

I started the plane and found that I had not ran off any Gremlins. When I
turn on the Alt. the oil pressure dropped from 75# to 60# then settled on
70#, this takes about one second. As soon as I turn off the Alt. the oil
pressure goes back to 75#. With the radio and Alt. on the oil pressure
needle drops a needle width when I key the radio. Again, with the Alt. off
keying the radio does not effect the oil pressure gauge which was back to
75#.

I did not fly so I didn't have any radio issues. I think I need to find the
cause of the apparent load on the oil pressure gauge first.

Oh, the Amp. meter  is a little positive at idle and the voltage is showing
a charge of about 14.4V and 13.5V with at Alt. off.

I'll appreciate any suggestions.

Thanks again, Tim




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