My 2001 honda civic 1.7 l, engine cranks and almost fires up. After it sits a couple days it will usually start?

My 2001 honda civic 1.7 l, engine cranks and almost fires up. After it sits a couple days it will usually start?

On a vehicle that old checking the cm timing is a good start.
Honda motors need the valves adjusted every 60,000 miles.
If that doesn't help try a blast of starting fluid into the throttle body

Could be a crack/moisture in the distributer. Works when it's dry, fails when it's wet.

By far the most common cause for that in that era Honda is a bad "main" (fuel pump) relay. The solder connections crack, making starting intermittent. Once running the vibration seems to keep it going. Thebax2006's recommendation for starting fluid is a good one - if that makes it fire and keep running I would bet on the main relay.

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