Quote:
Originally Posted by Gagarin737
A small piece of the graph from the flight I was talking about. First 0 psi indication at 600ft. Fuel flow stable. No drop in power. Third time in a row that I had these values during a first flight of the day. Still have to order a mechanical gauge.
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I have seen the same. I have the old sensor and not the Kavlico. The low pressure condition alarm not not occur during runup, but, usually just after take-off. The condition persists for about 1 minute and then the indicated fuel pressure climbs back to normal. This condition does not occur on every take-off. Maybe 10-15% of the time. Never any engine hesitation. Fuel flow remains normal. I have yet to determine a cause. I have vented the fuel pressure sensor line.
Others that I have talked to have observed a similar condition. The alarm is observed only by those where the low fuel pressure alarm is set to 2.2 psig. If the alarm is set to 0.7 psig (as was the case with Van's earlier locked settings file), this condition is masked and the pilot never sees it.
Will be very interested to hear your results with the mechanical gauge. I've always wanted to try, but, have never taken the time to install the mechanical gauge.