This month’s Ask a Tech Q&A comes from the owner of a Piper Arrow with a freshly overhauled Lycoming IO-360-B1E engine with low fuel pressure and IA Mike Berry had some useful advice. Larry Anglisano offers guidance on chasing the static system leak. First, the fuel pressure problem.
“For fuel pressure, the book calls for 20 PSI and I only get 15 PSI. The engine was overhauled using new cylinders, new cam and lifters, a new fuel pump, all rebuilt accessories and the fuel system was completely overhauled by a well-regarded shop. The fuel boost pump is confirmed good, as is the fuel pressure gauge.