Hello, I’m hoping to find some answers.
fired up my Honda concerto at 11pm. Started up no issues. Come 10am the next day, went to fire it up. Nothing just turning over.

under the assumption I ran it out of fuel, I got a Jerry can. Tried again, just turning over.

so. Went to replace spark plugs. There were oil in the wells on the plugs. I soaked up the oil. Replaced plugs. Replaced the HT leads. New seals etc. went to fire it up. Nothing. ( I believe this was just failure of well seals. Nothing more )

went to fire it up. It’s very ALMOST. started but battery died (:

charged up the battery, cracked off the nut to the rail as wasn’t sure it was going from filter to the rail, I put another Jerry can in, the pump is priming, it’s pressurised. And the return has pressure too. Unsure now if it’s getting from the rail through the inlet as it wouldn’t even fire up with easy start.

I will be doing a compression test. If replacing the fuel filter doesn’t make any difference. And also looking into injectors.

it’s so bizarre. As it worked one night and didn’t the day after. As if something has failed.

any help appreciated.