Sportquattro
Well Known Member
Hi folks, I had my final inspection done today by the LAA inspector and the only snag was fuel pressure reading.
Engine is a Lycoming O320-D2A carburettor fed. Cockpit is fitted with Garmin G3x touch, and the fuel pressure sensor is a Garmin 15psi sensor for carburettor engines.
All the Garmin kit was purchased new at the same time from Bournemouth Avionics.
With the engine not running but the Vans supplied electric fuel pump running the G3x display shows 39psi. No fuel leaking from the carburettor or other obvious issues. (As aircraft still apart for inspection not able to test with running engine at the moment)
I’m sure it’s a incorrect reading as if it really was 39 psi I’d expect to see fuel pouring from the carburettor as that pressure I imagine would overcome the float valve.
Any suggestions as to the cause and solution would be welcome as I’m stumped, my only thought is have I gat a mislabelled sensor for the injection version of the engine and if so would that even give a massive high reading spuriously?.
Thanks in advance before I start replacing expensive sensors that may not be the issue.
Nige
Engine is a Lycoming O320-D2A carburettor fed. Cockpit is fitted with Garmin G3x touch, and the fuel pressure sensor is a Garmin 15psi sensor for carburettor engines.
All the Garmin kit was purchased new at the same time from Bournemouth Avionics.
With the engine not running but the Vans supplied electric fuel pump running the G3x display shows 39psi. No fuel leaking from the carburettor or other obvious issues. (As aircraft still apart for inspection not able to test with running engine at the moment)
I’m sure it’s a incorrect reading as if it really was 39 psi I’d expect to see fuel pouring from the carburettor as that pressure I imagine would overcome the float valve.
Any suggestions as to the cause and solution would be welcome as I’m stumped, my only thought is have I gat a mislabelled sensor for the injection version of the engine and if so would that even give a massive high reading spuriously?.
Thanks in advance before I start replacing expensive sensors that may not be the issue.
Nige
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