PA31 pilot reported that the fuel pressure was indicating very high then an engine surged; then quit...

Attributes
ACN	1502813
Time
Date	201712
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-31 Navajo/Chieftan/Mojave/T1040
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Fuel Line Fittings & Connectors
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 3700 Flight Crew Type 1200
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

Flying level at 17;000 ft; left fuel pressure gauge indicated over 70 psi (off the scale); but several fuel flows; egt; cht were normal; including the ability to lean rop. When the fuel indicator showed left tank less than expected; ATC was contacted requesting nearby airports with at least 3500 ft. He asked souls onboard and I answered 5 and fuel on board. I think I indicated that we should have had at least 2.5 hours of fuel and that was why I wanted to make a precautionary landing. Right after answering him left engine surged and then quit. I feathered the prop and [advised ATC] and was given vectors to ZZZ. A single engine landing and taxi was made to the FBO; at which time they removed cowling and subsequently found fuel line had come loose. Repairs were made at that time and no further damage was noted. Flight was continued and no further issues arose.

Original NASA ASRS Text

Title: PA31 pilot reported that the fuel pressure was indicating very high then an engine surged; then quit.

Narrative: Flying level at 17;000 ft; left fuel pressure gauge indicated over 70 psi (off the scale); but several fuel flows; EGT; CHT were normal; including the ability to lean ROP. When the fuel indicator showed left tank less than expected; ATC was contacted requesting nearby airports with at least 3500 ft. He asked souls onboard and I answered 5 and fuel on board. I think I indicated that we should have had at least 2.5 hours of fuel and that was why I wanted to make a precautionary landing. Right after answering him left engine surged and then quit. I feathered the prop and [advised ATC] and was given vectors to ZZZ. A single engine landing and taxi was made to the FBO; at which time they removed cowling and subsequently found fuel line had come loose. Repairs were made at that time and no further damage was noted. Flight was continued and no further issues arose.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.