Re: Low Gauge Readings

[rawaudi@frugal.com (RWheeldon)]

Mike wrote:

>My 91 200q (3B engine) has suddenly started to display lower than normal
>readings on all the gauges. Volts down about 1v from normal, oil
>pressure down to just shy of 4 bar when driving and warm from where it
>used to be ~5bar and now just under 2 bar at idle, oil temp a notch or
>so low, etc..Even boost reads .9 with key on.

I think the one thing that all these reading have in common is the battery
voltage.  I'd check it first and make sure that with the engine running the
battery voltage is about 13.4 volts.  If not, the alternator is probably not
charging the battery.  If the battery voltage is OK, you may want to check
the voltage at the insturment panel.

Good luck,
Bob Wheeldon
'90 V8Q
Principal Engineer
Boeing Commercial Airplanes
robert a wheeldon@boeing.com
rawaudi@frugal.com