procharger Posted June 4, 2017 Report Share Posted June 4, 2017 Starting to get off and on alarms, sensor of fuel pump, pump was replaced 2 years ago ?? Link to comment Share on other sites More sharing options...
George in San Diego Posted June 4, 2017 Report Share Posted June 4, 2017 I've been through the same thing. First the pump then a few months later the sensor. There was a thread on this a couple of years ago as we discussed whether low pressure mattered in straight/level flying. The consensus was that fuel would gravity feed itself to the engine. George Link to comment Share on other sites More sharing options...
Roger Lee Posted June 4, 2017 Report Share Posted June 4, 2017 Very first thing to do is tighten all 5 ground points. They may be hand tight, but wrench loose. When it starts to involve multiple items it's usually a wire issue. Link to comment Share on other sites More sharing options...
procharger Posted June 5, 2017 Author Report Share Posted June 5, 2017 Took sender off today cleaned all contact surfaces sprayed orifice with cleaner flew for an hour and it maintained 3.7 hot, cold engine around 4.1 Link to comment Share on other sites More sharing options...
Roger Lee Posted June 5, 2017 Report Share Posted June 5, 2017 Those are normal numbers. Anywhere from 3.5 - 6 psi are very normal. Average is 3.5 - 5.5 psi. Link to comment Share on other sites More sharing options...
Anticept Posted June 5, 2017 Report Share Posted June 5, 2017 Keep in mind that low pressure alarms on takeoff is normal for a few seconds as well. I'm having trouble finding where it's officially written in the manuals, but it's out there. I've pointed it out to multiple people. It's one of the service bulletins or service letters. Edit: SB-912-063UL. Link to comment Share on other sites More sharing options...
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